2022届高考英语专题训练：时间状语从句（含答案）
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| 名称 | 2022届高考英语专题训练：时间状语从句（含答案） |  | |
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| 更新时间 | 2022-03-17 20:12:55 | ||
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高考专题训练——时间状语从句
_____ the time we started gardening, we have been trying to make our environment more beautiful.
A．As B．When C．Since D．Until
—How long will it be _____ the professor makes another visit to China
—It all depends.
A．until B．before C．since D．when
_____ the U.S. has been busy consuming, Asia, China in particular, has been investing in factories and technologies, so it can produce even more goods and services to sell abroad.
A．As B．Even if C．While D．Whether
_____ walking down the street, I came across David, whom I _____ for years.
A．As; didn't see B．As; haven't seen
C．When; hadn't seen D．When; wouldn't see
—When shall we go planting trees in the hill
—_____ it begins to rain, so they don't need watering.
A．Unless B．While C．Till D．Not until
Last Monday, I was chatting online _____, before I knew it, our manager came in and stood behind me.
A．until B．when C．unless D．so
It was the middle of the night _____ my dad woke me up and told me to watch the football game.
A．when B．that C．which D．as
I'm sorry you have been waiting so long, but it will still be some time _____ you can get your passport.
A．since B．till C．after D．before
After I had walked for six hours, _____.
A．I had been tired out B．I'll be tired out
C．I was tired out D．I would have been tired out
Tianjin soccer fans wonder how long it will be _____ the popular soccer star—Sunke can appear in the fields in Tianjin as a member of Tianjin Tianhai soccer team.
A．before B．since C．until D．where
_____ he woke up the next morning. He was surprised to find the ground covered with deep snow.
A．If B．When C．Unless D．Before
—How long do you think it will be _____ you graduate from high school
—Perhaps two or three months.
A．when B．until C．that D．before
I _____ out of the classroom when I bumped into a girl literally.
A．am running B．was running C．runs D．run
Mary rushed home _____ she heard the news, only _____ that her husband was gone.
A．as soon as; finding B．immediately; to find
C．the moment; find D．when; found
His heart was filled with joy _____ of arriving home in a couple of days.
A．when thinking B．when he thought
C．having thought D．to think
They were enjoying the sunshine on the beautiful beach _____ the terrible tsunami struck the island.
A．when B．while C．that D．where
I was so proud _____ my team won the ice hockey competition. It made me feel like I could achieve anything.
A．while B．when C．before D．until
Most people quit _____ any results appear; they give up too soon and a quitter never wins.
A．while B．until C．since D．before
One Friday, we were packing to leave for a weekend away _____ my daughter heard cries for help.
A．after B．while C．since D．when
The policemen went into action _____ they heard the alarm.
A．promptly B．presently C．quickly D．the moment
I wrote down my review about the film _____ it was reasonably fresh in my mind.
A．if B．though C．while D．before
How long do you think it will be ______ the car factory launches a new model
A．until B．when C．before D．that
Watch out for injuries while exercising. Always stop _____ you begin to feel any pain.
A．in order that B．even if C．ever since D．as soon as
Peter had been puzzled over the problem for over an hour _____ all at once the solution flashed across his mind.
A．when B．while C．then D．as
_____ a car reaches the end of its life, it is taken apart and any part that can be reused is sold off.
A．As B．With C．Once D．While
Nearly three months had gone by _____ the seriously injured girl showed a slight sign of recovery.
A．until B．since C．before D．after
_____ I went to the West Lake, I fell in love with it.
A．the first time B．by the first time
C．at the first time D．for the first time
_____ the average age of the population increases, there are more and more old people to care for.
A．Unless B．Until C．As D．When
They had walked in wrong directions for quite some time _____ they realized that they had got lost.
A．since B．while C．before D．after
He was about to tell me the secret _____ someone patted me on the shoulder.
A．that B．which C．when D．until
If you don't understand something, you may research, study, and talk to other people _____ you figure it out.
A．because B．though C．until D．since
The instant the finished his description. I knew it would be years _____ everything got right.
A．that B．before C．when D．since
Scientists say it may be five or ten years _____ it's possible to test this medicine on human patients.
A．since B．before C．after D．when
He was about to leave the office for home _____ someone knocked the door and asked for some help.
A．until B．when C．as D．while
My friend walked me to the bus stop and waited with me _____ the bus arrived.
A．once B．unless C．when D．until
The girl was then hit a second time by another van _____ an elderly trash collector came to her aid, according to some witnesses.
A．before B．where C．until D．when
Please call my secretary to arrange a meeting this afternoon, or _____ it is convenient to you.
A．wherever B．however C．whichever D．whenever
Fortunately somebody who happened to be passing by called the fire department _____ the fire broke out.
A．hurriedly B．quickly C．instantly D．shortly
_____ the resumption of trans-provincial group tourism, some offline travel agencies were offering short-distance tours within their province despite low profits.
A．Before B．Because C．When
The meaning of the word "nice" changed a few times _____ it finally came to include the sense "pleasant".
A．before B．after C．since D．while
We had _____ arrived at the train station when the train began to move.
A．no sooner B．hardly C．almost D．nearly
He flashed me a quick smile but rapidly swallowed it _____ he saw my expression.
A．when B．unless C．if D．until
Disappointed, I was about to leave _____ something occurred, which _____ my attention.
A．while, paid B．and, got C．before, drew D．when, attracted
—How long do you suppose it is _____ he arrived and began to work there
A．when B．before C．after D．since
She had just finished her homework _____ her mother asked her to practice playing the piano yesterday.
A．when B．while C．after D．since
_____ that they lost the game, tears came down Kate's face.
A．On hearing the news
B．When heard the news
C．The moment she heard the news
D．While hearing the news
My trusty printer was busy producing an important report _____ it simply stopped.
A．and B．as C．when D．until
_____, a police officer came up and asked if he could help me.
A．While looking at the map B．While looked at the map
C．While having looked at the map D．While I was looking at the map
I just sat by the window watching the passing scene _____ I caught the eye of a waiter and ordered my meal.
A．once B．while C．until D．since
How long do you think _____ the computer company brings out a new product
A．it will be before B．will it be until
C．will it be when D．it will be that
答案
1. 【答案】C
【知识点】（ever）since引导的时间状语从句、(ever) since
2. 【答案】B
【知识点】It will be/was (not) +一段时间+before、before
3. 【答案】C
【解析】考查连词。句意：在美国人忙着消费的时候，而亚洲，尤其是中国，却一直在工厂和技术上投资，因此，它可以生产更多的商品和服务到国外销售。A. As 因为，一边……一边；B. Even if 尽管，即使；C. While 然而，当；D. Whether 是否。根据句意可知，此处强调美国和亚洲尤其是中国的对比，表对比用 while。故选 C 项。
【知识点】while引导的时间状语从句、while
4. 【答案】C
【解析】根据句意和结构可知这句话使用 when 引导时间状语从句，whom 引导定语从句，从句中“没有见到他”是发生在“came across”之前，表示过去的过去的动作，用过去完成时。故选：C。
【知识点】表示过去的过去、when引导的时间状语从句
5. 【答案】D
【解析】正确答案是D。
此题考查的是连词辨析。句意：——我们该什么时候到山上植树？——我们应该直到开始下雨才上山植树，这样所种的树就不需要浇水了。unless 如果不；除非；while 虽然；当……时候；till 直到；not until 直到……才……。补充完整后的句子为：We shall not go planting trees in the hill until it begins to rain, so they don't need watering. 故选D。
【知识点】not...until...
6. 【答案】B
【知识点】sb.be doing sth.when...、when
7. 【答案】A
【解析】此题考查状语从句。句意：半夜爸爸叫醒我，告诉我看足球赛。此题容易和强调句混淆，强调句句型应该在 the middle of the night 前面加介词 at。此处非强调句而是时间状语，引导词用 when。
【知识点】when引导的时间状语从句、when
8. 【答案】D
【知识点】It will be/was (not) +一段时间+before
9. 【答案】C
【知识点】after引导的时间状语从句、在过去某一时间发生的动作或存在的状态
10. 【答案】A
【解析】此题考查状语从句。句意：天津的球迷想知道距离广受欢迎的足球明星孙可作为“天津天海”球队的一员出现在球场上还有多长时间。此处是“it will be+ 时间+ before...”句型，表示“还有多久才……，距离……还有多长时间”。
【知识点】It will be/was (not) +一段时间+before
11. 【答案】B
【解析】句意：当他第二天早上醒来时，他惊奇地发现地上覆盖着厚厚的积雪。if 如果；when 当……的时候；unless 除非；before 还没有来得及……就。根据句意答案 B 符合语境。
【知识点】when、when引导的时间状语从句
12. 【答案】D
【知识点】It will be/was (not) +一段时间+before
13. 【答案】B
【解析】考查时态。句意：我正要跑出教室，突然碰到一个女孩。be doing... when... 为固定用法，意为“正在此时；突然”。根据“when I bumped into a girl literally.”可知，此句是过去进行时。故选 B。
【知识点】sb.be doing sth.when...、表示过去某一时刻正在发生的动作
14. 【答案】B
【知识点】only to do、immediately
15. 【答案】B
【解析】本句的主语是 his heart，如选 A，when thinking=when his heart was thinking，主语有问题，“心”不能想，错。如选 C，having thought 的逻辑主语也是 his heart，错。如选 D，to think 的逻辑主语也是 his heart，也错。只有用状语从句 when he thought 时，从句有从句的主语和谓语，主句有主句的主语和谓语，正确。
【知识点】when引导的时间状语从句
16. 【答案】A
【解析】讲一讲 when 和 while 的区别和用法：
（1）由 when 引导的状语从句中的谓语动词可以用瞬间动词，也可以用延续性动词。但是，由 while 引导的状语从句中的谓语动词不能用瞬间动词，只能用延续性动词：
正：When I finished my homework, it was 10:30.
正：When I was doing my homework, my father was watching TV.
正：While I was doing my homework, my father was watching TV.
误：While I finished my homework, it was 10:30.
（2）当主句和从句的动词发生有先有后时，用 when：
正：I was walking in the street when I caught sight of a tailor's shop. 意为：“我在街上走着，然后看见了一家裁缝店。”这里的 when 表示“然后”，先 walk，再 caught sight of。
误：I was walking in the street while I caught sight of a tailor's shop.
（3）当表示“与此同时，与此相反”时，只能用 while，不能用 when：
正：The student could solve this problem while the teacher couldn't.
误：The student could solve this problem when the teacher couldn't.
本题的动词发生有先有后，enjoy the sunshine 在先；the terrible tsunami struck 在后。所以选 A，when 正确。
【知识点】when、sb.be doing sth.when...
17. 【答案】B
【知识点】when引导的时间状语从句
18. 【答案】D
【解析】句意：大多数人们在知道结果之前就退出了，他们太轻易放弃，一个轻易放弃的人永远不会有赢的机会。while 尽管，当……时；until 直到；since 既然，由于，自从；before 在……之前。
【知识点】before引导的时间状语从句、before
19. 【答案】D
【解析】此题考查时间状语从句。句意：某个周五，当我们正在收拾行李准备外出过周末时，我女儿突然听见求救声。when 的特殊用法，主句用过去进行时，从句用一般过去时，表示某件事突然发生，when 理解成“这时，突然”。
【知识点】sb.be doing sth.when...、when
20. 【答案】D
【知识点】the moment
21. 【答案】C
【解析】句意：趁着电影内容还在脑海里，我写下了影评。while 在……期间；if 如果；though 尽管；before 在……前。
【知识点】while引导的时间状语从句、while
22. 【答案】C
【知识点】It will be/was (not) +一段时间+before、before
23. 【答案】D
【解析】考查时间状语从句。句意:进行锻炼时要小心受伤，一感到疼痛，就停下来。in order that 为了；even if 即使；ever since 自从；as soon as 一……就……。
【知识点】as soon as引导的时间状语从句、as soon as
24. 【答案】A
【解析】Peter 已经被这个问题困扰一个多小时了，突然解决方法从他脑海里闪过。
A. when 当……时候；B. while 当……时候，尽管，然而；C. then 然后；D. as 当……时候，因为，尽管。分析句子可知，此处考查固定句型 had done…when…，表示“已经/刚做完某事……（突然）就……”，A 项正确。
【知识点】when、sb. had (just/scarcely/hardly/barely) done sth. when...
25. 【答案】C
【知识点】once引导的时间状语从句、once
26. 【答案】C
【解析】考查连词。until 直到……才；since 自从；before 在之前；after 在……之后。before 与一段时间连用，意为“一段时间以后”。句意：几乎三个月以后那位受伤严重的女孩才慢慢地显示出康复的迹象。
【知识点】before引导的时间状语从句、before
27. 【答案】A
【知识点】the first time
28. 【答案】C
【解析】句意：随着人口平均年龄的增加，越来越多的老年人需要照顾。分析句子结构可知，as 在此引导状语从句，表示“随着”。
【知识点】as、as引导的时间状语从句
29. 【答案】C
【解析】句意：他们朝错误方向行进了很长时间后才发现他们迷路了。由句意可知，用 before，表示“在……之前”。
【知识点】before引导的时间状语从句、before
30. 【答案】C
【解析】考查固定句式。句意：他正要告诉我这个秘密，这时有人拍了我的肩膀。be about to do when... 表示“正要做……这时（突然）发生某事”，故 C 项正确。
【知识点】sb.be about to do sth. when...
31. 【答案】C
【解析】句意：如果遇到不懂的东西，你可以搜索、研究，和别人交流直到弄明白。
本题考查状语从句，A 选项意为“因为”，B 选项意为“尽管”，D 选项“自从”或者“因为”，C 选项“直到”符合语境，答案选 C。
【知识点】until、till/until引导的时间状语从句
32. 【答案】B
【知识点】It will be/was (not) +一段时间+before、before
33. 【答案】B
【知识点】before、It will be/was (not) +一段时间+before
34. 【答案】B
【知识点】when、sb.be about to do sth. when...
35. 【答案】D
【知识点】till/until引导的时间状语从句
36. 【答案】D
【解析】在一个年迈的清洁工来帮她之前，这个女孩被另一辆货车撞了第二次。when 应该是前面 was/ be doing 的长动作，表示这时，此处是选 when。
【知识点】when、when引导的时间状语从句
37. 【答案】D
【解析】此题考查状语从句。句意：请打给我的秘书安排一次会面，在下午或者任何你方便的时间。it is convenient to you 在你方便的时候，表示的是时间，引导词用 whenever。
【知识点】whenever引导的时间状语从句、whenever
38. 【答案】C
【知识点】instantly、副词的辨析
39. 【答案】A
【知识点】before、before引导的时间状语从句
40. 【答案】A
【解析】句意：在“nice”这个词最后包含有“pleasant”的意思之前，它的意思已经变化了好几次了。before 在此处引导时间状语从句，意为“在……之前”。
【知识点】before引导的时间状语从句、before
41. 【答案】B
【知识点】sb. had (just/scarcely/hardly/barely) done sth. when...
42. 【答案】A
【解析】他迅速地向我微笑，但当他看到我的表情时，很快就忍住了。
A. when 当……时候；B；C. if 如果；D. 根据句意可知这里使用 when 引导时间状语从句。
【知识点】when、when引导的时间状语从句
43. 【答案】D
【知识点】attract、动词及动词短语的辨析、sb.be about to do sth. when...、attract one's attention
44. 【答案】D
【解析】此题考查时间状语从句。句意：你认为自从他来到这里开始工作。多久了？when 当……时候；before 在……之前；after 在之后； since 自从。此处强调从过去到现在多久了，用 since。
【知识点】（ever）since引导的时间状语从句、(ever) since
45. 【答案】A
【知识点】sb. had (just/scarcely/hardly/barely) done sth. when...
46. 【答案】C
【知识点】the moment
47. 【答案】C
【解析】when 引导时间状语从句。
【知识点】sb.be doing sth.when...、when
48. 【答案】D
【知识点】while引导的时间状语从句
49. 【答案】C
【解析】句意：我就坐在窗边看着来来往往的场景，直到（until）我引起了一个服务员的注意点了餐。once 意为“一旦”，while 意为“同时，正在”，since 意为“既然”，均不符合题意。
【知识点】until、till/until引导的时间状语从句
50. 【答案】A
【解析】do you think 后用陈述语序。
【知识点】It will be/was (not) +一段时间+before
_____ the time we started gardening, we have been trying to make our environment more beautiful.
A．As B．When C．Since D．Until
—How long will it be _____ the professor makes another visit to China
—It all depends.
A．until B．before C．since D．when
_____ the U.S. has been busy consuming, Asia, China in particular, has been investing in factories and technologies, so it can produce even more goods and services to sell abroad.
A．As B．Even if C．While D．Whether
_____ walking down the street, I came across David, whom I _____ for years.
A．As; didn't see B．As; haven't seen
C．When; hadn't seen D．When; wouldn't see
—When shall we go planting trees in the hill
—_____ it begins to rain, so they don't need watering.
A．Unless B．While C．Till D．Not until
Last Monday, I was chatting online _____, before I knew it, our manager came in and stood behind me.
A．until B．when C．unless D．so
It was the middle of the night _____ my dad woke me up and told me to watch the football game.
A．when B．that C．which D．as
I'm sorry you have been waiting so long, but it will still be some time _____ you can get your passport.
A．since B．till C．after D．before
After I had walked for six hours, _____.
A．I had been tired out B．I'll be tired out
C．I was tired out D．I would have been tired out
Tianjin soccer fans wonder how long it will be _____ the popular soccer star—Sunke can appear in the fields in Tianjin as a member of Tianjin Tianhai soccer team.
A．before B．since C．until D．where
_____ he woke up the next morning. He was surprised to find the ground covered with deep snow.
A．If B．When C．Unless D．Before
—How long do you think it will be _____ you graduate from high school
—Perhaps two or three months.
A．when B．until C．that D．before
I _____ out of the classroom when I bumped into a girl literally.
A．am running B．was running C．runs D．run
Mary rushed home _____ she heard the news, only _____ that her husband was gone.
A．as soon as; finding B．immediately; to find
C．the moment; find D．when; found
His heart was filled with joy _____ of arriving home in a couple of days.
A．when thinking B．when he thought
C．having thought D．to think
They were enjoying the sunshine on the beautiful beach _____ the terrible tsunami struck the island.
A．when B．while C．that D．where
I was so proud _____ my team won the ice hockey competition. It made me feel like I could achieve anything.
A．while B．when C．before D．until
Most people quit _____ any results appear; they give up too soon and a quitter never wins.
A．while B．until C．since D．before
One Friday, we were packing to leave for a weekend away _____ my daughter heard cries for help.
A．after B．while C．since D．when
The policemen went into action _____ they heard the alarm.
A．promptly B．presently C．quickly D．the moment
I wrote down my review about the film _____ it was reasonably fresh in my mind.
A．if B．though C．while D．before
How long do you think it will be ______ the car factory launches a new model
A．until B．when C．before D．that
Watch out for injuries while exercising. Always stop _____ you begin to feel any pain.
A．in order that B．even if C．ever since D．as soon as
Peter had been puzzled over the problem for over an hour _____ all at once the solution flashed across his mind.
A．when B．while C．then D．as
_____ a car reaches the end of its life, it is taken apart and any part that can be reused is sold off.
A．As B．With C．Once D．While
Nearly three months had gone by _____ the seriously injured girl showed a slight sign of recovery.
A．until B．since C．before D．after
_____ I went to the West Lake, I fell in love with it.
A．the first time B．by the first time
C．at the first time D．for the first time
_____ the average age of the population increases, there are more and more old people to care for.
A．Unless B．Until C．As D．When
They had walked in wrong directions for quite some time _____ they realized that they had got lost.
A．since B．while C．before D．after
He was about to tell me the secret _____ someone patted me on the shoulder.
A．that B．which C．when D．until
If you don't understand something, you may research, study, and talk to other people _____ you figure it out.
A．because B．though C．until D．since
The instant the finished his description. I knew it would be years _____ everything got right.
A．that B．before C．when D．since
Scientists say it may be five or ten years _____ it's possible to test this medicine on human patients.
A．since B．before C．after D．when
He was about to leave the office for home _____ someone knocked the door and asked for some help.
A．until B．when C．as D．while
My friend walked me to the bus stop and waited with me _____ the bus arrived.
A．once B．unless C．when D．until
The girl was then hit a second time by another van _____ an elderly trash collector came to her aid, according to some witnesses.
A．before B．where C．until D．when
Please call my secretary to arrange a meeting this afternoon, or _____ it is convenient to you.
A．wherever B．however C．whichever D．whenever
Fortunately somebody who happened to be passing by called the fire department _____ the fire broke out.
A．hurriedly B．quickly C．instantly D．shortly
_____ the resumption of trans-provincial group tourism, some offline travel agencies were offering short-distance tours within their province despite low profits.
A．Before B．Because C．When
The meaning of the word "nice" changed a few times _____ it finally came to include the sense "pleasant".
A．before B．after C．since D．while
We had _____ arrived at the train station when the train began to move.
A．no sooner B．hardly C．almost D．nearly
He flashed me a quick smile but rapidly swallowed it _____ he saw my expression.
A．when B．unless C．if D．until
Disappointed, I was about to leave _____ something occurred, which _____ my attention.
A．while, paid B．and, got C．before, drew D．when, attracted
—How long do you suppose it is _____ he arrived and began to work there
A．when B．before C．after D．since
She had just finished her homework _____ her mother asked her to practice playing the piano yesterday.
A．when B．while C．after D．since
_____ that they lost the game, tears came down Kate's face.
A．On hearing the news
B．When heard the news
C．The moment she heard the news
D．While hearing the news
My trusty printer was busy producing an important report _____ it simply stopped.
A．and B．as C．when D．until
_____, a police officer came up and asked if he could help me.
A．While looking at the map B．While looked at the map
C．While having looked at the map D．While I was looking at the map
I just sat by the window watching the passing scene _____ I caught the eye of a waiter and ordered my meal.
A．once B．while C．until D．since
How long do you think _____ the computer company brings out a new product
A．it will be before B．will it be until
C．will it be when D．it will be that
答案
1. 【答案】C
【知识点】（ever）since引导的时间状语从句、(ever) since
2. 【答案】B
【知识点】It will be/was (not) +一段时间+before、before
3. 【答案】C
【解析】考查连词。句意：在美国人忙着消费的时候，而亚洲，尤其是中国，却一直在工厂和技术上投资，因此，它可以生产更多的商品和服务到国外销售。A. As 因为，一边……一边；B. Even if 尽管，即使；C. While 然而，当；D. Whether 是否。根据句意可知，此处强调美国和亚洲尤其是中国的对比，表对比用 while。故选 C 项。
【知识点】while引导的时间状语从句、while
4. 【答案】C
【解析】根据句意和结构可知这句话使用 when 引导时间状语从句，whom 引导定语从句，从句中“没有见到他”是发生在“came across”之前，表示过去的过去的动作，用过去完成时。故选：C。
【知识点】表示过去的过去、when引导的时间状语从句
5. 【答案】D
【解析】正确答案是D。
此题考查的是连词辨析。句意：——我们该什么时候到山上植树？——我们应该直到开始下雨才上山植树，这样所种的树就不需要浇水了。unless 如果不；除非；while 虽然；当……时候；till 直到；not until 直到……才……。补充完整后的句子为：We shall not go planting trees in the hill until it begins to rain, so they don't need watering. 故选D。
【知识点】not...until...
6. 【答案】B
【知识点】sb.be doing sth.when...、when
7. 【答案】A
【解析】此题考查状语从句。句意：半夜爸爸叫醒我，告诉我看足球赛。此题容易和强调句混淆，强调句句型应该在 the middle of the night 前面加介词 at。此处非强调句而是时间状语，引导词用 when。
【知识点】when引导的时间状语从句、when
8. 【答案】D
【知识点】It will be/was (not) +一段时间+before
9. 【答案】C
【知识点】after引导的时间状语从句、在过去某一时间发生的动作或存在的状态
10. 【答案】A
【解析】此题考查状语从句。句意：天津的球迷想知道距离广受欢迎的足球明星孙可作为“天津天海”球队的一员出现在球场上还有多长时间。此处是“it will be+ 时间+ before...”句型，表示“还有多久才……，距离……还有多长时间”。
【知识点】It will be/was (not) +一段时间+before
11. 【答案】B
【解析】句意：当他第二天早上醒来时，他惊奇地发现地上覆盖着厚厚的积雪。if 如果；when 当……的时候；unless 除非；before 还没有来得及……就。根据句意答案 B 符合语境。
【知识点】when、when引导的时间状语从句
12. 【答案】D
【知识点】It will be/was (not) +一段时间+before
13. 【答案】B
【解析】考查时态。句意：我正要跑出教室，突然碰到一个女孩。be doing... when... 为固定用法，意为“正在此时；突然”。根据“when I bumped into a girl literally.”可知，此句是过去进行时。故选 B。
【知识点】sb.be doing sth.when...、表示过去某一时刻正在发生的动作
14. 【答案】B
【知识点】only to do、immediately
15. 【答案】B
【解析】本句的主语是 his heart，如选 A，when thinking=when his heart was thinking，主语有问题，“心”不能想，错。如选 C，having thought 的逻辑主语也是 his heart，错。如选 D，to think 的逻辑主语也是 his heart，也错。只有用状语从句 when he thought 时，从句有从句的主语和谓语，主句有主句的主语和谓语，正确。
【知识点】when引导的时间状语从句
16. 【答案】A
【解析】讲一讲 when 和 while 的区别和用法：
（1）由 when 引导的状语从句中的谓语动词可以用瞬间动词，也可以用延续性动词。但是，由 while 引导的状语从句中的谓语动词不能用瞬间动词，只能用延续性动词：
正：When I finished my homework, it was 10:30.
正：When I was doing my homework, my father was watching TV.
正：While I was doing my homework, my father was watching TV.
误：While I finished my homework, it was 10:30.
（2）当主句和从句的动词发生有先有后时，用 when：
正：I was walking in the street when I caught sight of a tailor's shop. 意为：“我在街上走着，然后看见了一家裁缝店。”这里的 when 表示“然后”，先 walk，再 caught sight of。
误：I was walking in the street while I caught sight of a tailor's shop.
（3）当表示“与此同时，与此相反”时，只能用 while，不能用 when：
正：The student could solve this problem while the teacher couldn't.
误：The student could solve this problem when the teacher couldn't.
本题的动词发生有先有后，enjoy the sunshine 在先；the terrible tsunami struck 在后。所以选 A，when 正确。
【知识点】when、sb.be doing sth.when...
17. 【答案】B
【知识点】when引导的时间状语从句
18. 【答案】D
【解析】句意：大多数人们在知道结果之前就退出了，他们太轻易放弃，一个轻易放弃的人永远不会有赢的机会。while 尽管，当……时；until 直到；since 既然，由于，自从；before 在……之前。
【知识点】before引导的时间状语从句、before
19. 【答案】D
【解析】此题考查时间状语从句。句意：某个周五，当我们正在收拾行李准备外出过周末时，我女儿突然听见求救声。when 的特殊用法，主句用过去进行时，从句用一般过去时，表示某件事突然发生，when 理解成“这时，突然”。
【知识点】sb.be doing sth.when...、when
20. 【答案】D
【知识点】the moment
21. 【答案】C
【解析】句意：趁着电影内容还在脑海里，我写下了影评。while 在……期间；if 如果；though 尽管；before 在……前。
【知识点】while引导的时间状语从句、while
22. 【答案】C
【知识点】It will be/was (not) +一段时间+before、before
23. 【答案】D
【解析】考查时间状语从句。句意:进行锻炼时要小心受伤，一感到疼痛，就停下来。in order that 为了；even if 即使；ever since 自从；as soon as 一……就……。
【知识点】as soon as引导的时间状语从句、as soon as
24. 【答案】A
【解析】Peter 已经被这个问题困扰一个多小时了，突然解决方法从他脑海里闪过。
A. when 当……时候；B. while 当……时候，尽管，然而；C. then 然后；D. as 当……时候，因为，尽管。分析句子可知，此处考查固定句型 had done…when…，表示“已经/刚做完某事……（突然）就……”，A 项正确。
【知识点】when、sb. had (just/scarcely/hardly/barely) done sth. when...
25. 【答案】C
【知识点】once引导的时间状语从句、once
26. 【答案】C
【解析】考查连词。until 直到……才；since 自从；before 在之前；after 在……之后。before 与一段时间连用，意为“一段时间以后”。句意：几乎三个月以后那位受伤严重的女孩才慢慢地显示出康复的迹象。
【知识点】before引导的时间状语从句、before
27. 【答案】A
【知识点】the first time
28. 【答案】C
【解析】句意：随着人口平均年龄的增加，越来越多的老年人需要照顾。分析句子结构可知，as 在此引导状语从句，表示“随着”。
【知识点】as、as引导的时间状语从句
29. 【答案】C
【解析】句意：他们朝错误方向行进了很长时间后才发现他们迷路了。由句意可知，用 before，表示“在……之前”。
【知识点】before引导的时间状语从句、before
30. 【答案】C
【解析】考查固定句式。句意：他正要告诉我这个秘密，这时有人拍了我的肩膀。be about to do when... 表示“正要做……这时（突然）发生某事”，故 C 项正确。
【知识点】sb.be about to do sth. when...
31. 【答案】C
【解析】句意：如果遇到不懂的东西，你可以搜索、研究，和别人交流直到弄明白。
本题考查状语从句，A 选项意为“因为”，B 选项意为“尽管”，D 选项“自从”或者“因为”，C 选项“直到”符合语境，答案选 C。
【知识点】until、till/until引导的时间状语从句
32. 【答案】B
【知识点】It will be/was (not) +一段时间+before、before
33. 【答案】B
【知识点】before、It will be/was (not) +一段时间+before
34. 【答案】B
【知识点】when、sb.be about to do sth. when...
35. 【答案】D
【知识点】till/until引导的时间状语从句
36. 【答案】D
【解析】在一个年迈的清洁工来帮她之前，这个女孩被另一辆货车撞了第二次。when 应该是前面 was/ be doing 的长动作，表示这时，此处是选 when。
【知识点】when、when引导的时间状语从句
37. 【答案】D
【解析】此题考查状语从句。句意：请打给我的秘书安排一次会面，在下午或者任何你方便的时间。it is convenient to you 在你方便的时候，表示的是时间，引导词用 whenever。
【知识点】whenever引导的时间状语从句、whenever
38. 【答案】C
【知识点】instantly、副词的辨析
39. 【答案】A
【知识点】before、before引导的时间状语从句
40. 【答案】A
【解析】句意：在“nice”这个词最后包含有“pleasant”的意思之前，它的意思已经变化了好几次了。before 在此处引导时间状语从句，意为“在……之前”。
【知识点】before引导的时间状语从句、before
41. 【答案】B
【知识点】sb. had (just/scarcely/hardly/barely) done sth. when...
42. 【答案】A
【解析】他迅速地向我微笑，但当他看到我的表情时，很快就忍住了。
A. when 当……时候；B；C. if 如果；D. 根据句意可知这里使用 when 引导时间状语从句。
【知识点】when、when引导的时间状语从句
43. 【答案】D
【知识点】attract、动词及动词短语的辨析、sb.be about to do sth. when...、attract one's attention
44. 【答案】D
【解析】此题考查时间状语从句。句意：你认为自从他来到这里开始工作。多久了？when 当……时候；before 在……之前；after 在之后； since 自从。此处强调从过去到现在多久了，用 since。
【知识点】（ever）since引导的时间状语从句、(ever) since
45. 【答案】A
【知识点】sb. had (just/scarcely/hardly/barely) done sth. when...
46. 【答案】C
【知识点】the moment
47. 【答案】C
【解析】when 引导时间状语从句。
【知识点】sb.be doing sth.when...、when
48. 【答案】D
【知识点】while引导的时间状语从句
49. 【答案】C
【解析】句意：我就坐在窗边看着来来往往的场景，直到（until）我引起了一个服务员的注意点了餐。once 意为“一旦”，while 意为“同时，正在”，since 意为“既然”，均不符合题意。
【知识点】until、till/until引导的时间状语从句
50. 【答案】A
【解析】do you think 后用陈述语序。
【知识点】It will be/was (not) +一段时间+before