Unit 2 I’ll help to clean up the city parks.
重点
1. I take after my mother. 我像我的妈妈。
take after意为"(在外貌、性格等方面)与(父母等)相像"。其同义短语为:be similar to"与……相似"。
? Steve takes after his father. They are both creative. 史蒂夫像他父亲。他们都富有创造力。
? She was a smart, brave woman. You take after her. 她是一名聪明、勇敢的女子。你像她。
【知识拓展】
look like表达"像"
look like意为"看起来像……",常指外貌、长相相似。
? Lucy looks like her twin sister Lily. They both have big eyes. 露西看起来像她的双胞胎姐姐莉莉。她们都长着一双大眼睛。
①琳达像她的妈妈。她们都很热情。
Linda _____________ _____________ her mother. They are both warm-hearted.
②Bob takes after his father. (改为同义句)
Bob _____________ _____________ _____________ his father.
③汤姆长得像他的爸爸。他们都是卷发。
Tom _____________ _____________ his father. They both have curly hair.
【答案】①takes after ②is similar to ③looks like
2. I fixed it up. 我把它修理好了。
fix up意为"修理;修补",是由"动词+副词"构成的短语动词,名词作宾语可放在短语中间或短语后面。代词作宾语时应置于fix与up之间。
? The computer doesn’t work. Can you fix it up? 这台电脑坏了,你会修理吗?
【易混辨析】
repair
表示使受到一定损坏或失灵的
东西恢复其性能或机能,其对
象范围很广,从道路、机器到
日常用品等
mend
常表示修补破损的东西,使其
恢复原样,一般指较小的物品。
如:mend the shoes/the windows等
①约翰叔叔业余时间修理旧电脑。
Uncle John _____________ _____________ old computers in his spare time.
②你能帮我修补一下衬衣吗?
Can you help me_____________ my shirt?
③我的自行车坏了,你能帮我修理它吗?
My bike is broken. Could you_____________ it for me?
【答案】①fixes up ②mend/repair ③repair
3. set up建立;设立
? Many volunteers would like to set up an organization to help poor people. 许多志愿者想设立一个机构来帮助穷人。
【易混辨析】 set up与build
set up
意为"建立,设立,开办",后常接某一组织、机构、团体等。
build
意为"建造,修建",后常接建筑物、机械等。
【一语辨异】They set up an organization to help the poor build houses. 他们设立了一个组织来帮助穷人建造房子。
【知识拓展】
set up也可意为"竖立,架起,建起"。
? They are going to set up a bridge between the two islands. 他们打算在这两个岛之间架起一座桥梁。
Our school is planning to _____________ a band to give the students a chance to show their musical talent.
A. take up B. set up C. pick up
【答案】B
4. You helped to make it possible for me to have Lucky. 你帮助我, 使我能够拥有Lucky。
(1)句中make是使役动词,意为"使;使成为",后常跟复合结构,即"make+宾语+宾语补足语(形容词)"。? Computers make it easy to learn English. 电脑使英语学习变得容易。
(2)句中it作形式宾语,真正的宾语是后置的动词不定式复合结构for me to have Lucky。
【知识拓展】
it作形式宾语的用法
(1)当不定式作宾语,且其后有宾语补足语时,常用it作形式宾语,而将动词不定式置于句末。
? We find it important to learn English well. 我们发现学好英语很重要。
(2)常跟it作形式宾语的动词有:make/find/feel/consider/think等。
①互联网使人们购物更加容易。
The Internet _____________ _____________ easier for people _____________ _____________.
②他认为在这么短的时间内完成这项工作很难。
He thinks _____________ difficult _____________ _____________ the work in such a short time.
③我发现和朋友网上聊天很有趣。
I find _____________ interesting _____________ _____________ online with friends.
【答案】①makes it;to shop ②it;to finish ③it;to chat
5. make a difference 有影响,有作用
其后可跟to sb /sth,意为"对某人或某事产生影响"。
? The recent talk between Tom and his parents made a big difference to him.
最近汤姆和他父母之间的一次谈话对他产生了很大的影响。
【知识拓展】
make no difference 没有作用,没有影响
? It makes no difference to me. 这对我没什么影响。
Never lose heart. I believe you will make a _____________ this term as long as you are more hard-working.
A. different B. difference C. difficult D. decision
【答案】B
6. imagine v. 想象;设想
(1)imagine可用作及物动词,后加名词、代词、动名词或从句作宾语。
? We often imagine living in a big house. 我们经常想象住在一所大房子里。
? Close your eyes and imagine (that) you’re in the forest. 闭上眼睛,想象你在森林里。
【巧记口诀】
巧记后接动名词的词
特殊动词接动名,使用它们要记清。
放弃(give up)享受(enjoy)可后悔(regret),
坚持(keep)练习(practice)必完成(finish)。
延期(put off) 建议(advise)勿介意(mind),
掌握它们今必行。
(2)imagine可用作不及物动词。
? He became very angry after he knew the truth. It is very easy to imagine. 知道真相后,他很生气。这很容易想象得到。
The Internet is so closely connected with our daily life. Can you _____________ a life without it?
A. understand B. imagine C. consider D. expect
【答案】B
7. Most people would never think about this, but many people have these difficulties. 大多数人从没考虑过这一点,但是许多人有这样的困难。
difficulty此处用作可数名词,通常用作复数形式,表示具体概念,意为"困难;难题;难事",其形容词形式为difficult,意为困难的。
? There are lots of children with reading difficulties. 有很多存在阅读困难的儿童。
? He met with many difficulties when traveling. 他在旅行中遇到了许多困难。
【知识拓展】
difficulty表示抽象意义上的"困难"时,是不可数名词,have difficulty (in) doing sth表示"做某事有困难",=have trouble (in) doing sth
? I had great difficulty (in) finishing the task. 完成这项任务我觉得很困难。
Jackson has difficulty in _____________ (solve) the problem in such a short time.
【答案】solving
8. I can’t use my arms or legs well, so normal things like answering the telephone, opening and closing doors, or carrying things are difficult for me. 因为我不能灵活地使用胳膊和腿, 因此像接电话、开关门或提东西等这些正常的事对我来说都很困难。
(1)句中like作介词,意为"像;如同",后接名词或动词-ing形式作宾语。
? I have many hobbies, like painting, dancing, collecting stamps and so on. 我有许多爱好,像画画、跳舞、集邮等。
(2)carry作动词,意为"拿;提;扛",后接名词作宾语。
? Let me help you carry the box. 让我来帮你提箱子吧。
【易混辨析】 bring/take/carry/fetch/get
(1)bring意为"带来;拿来",指把人或物从别处带到说话人所在的地方。
? Please bring the homework to me tomorrow. 明天请把作业给我带来。
(2)take意为"拿走;取",指把人或物从说话人所在地带到别处去。
? Take an umbrella with you, please. 请随身带把伞。
(3)carry无方向性,含"负重"之意,一般指随身携带,如手提、肩扛等。
(4)fetch指从说话者所在地到别处去把人或物带回来。
(5)get与fetch同义,但更口语化。
【图解助记】
①我弟弟有许多爱好,像打篮球、滑冰等。
My brother has many hobbies, _____________ _____________ basketball, skating and so on.
②这篮子装得太满,我提不动它。
The basket is so full that I can’t _____________ it.
【答案】①like playing ②carry
9. He put up some signs asking for old bikes... 他张贴了一些海报求购旧自行车……
(1)put up意为"张贴;搭建",是"动词+副词"构成的短语动词,名词作宾语时既可置于短语之间又可置于短语后面。
? Many blocks of flats were put up in the 1990’s. 许多公寓式建筑群都是20世纪90年代建的。
(2)代词作宾语时应置于短语中间。
? Here are some new pictures. Please put them up on the wall. 这儿有几张新画,请把它们贴到墙上去。
这儿是一些"禁止吸烟"的标识。咱们把它们贴到墙上吧。
Here are some signs saying "No smoking". Let’s _____________ _____________ _____________ on the wall.
【答案】put them up
10. The ideas that he came up with worked out fine. 他想出的主意效果非常好。
work out意为"产生结果;发展;成功"。可以单独使用。
? I think that this interesting program will work out. 我认为这个有趣的方案将会成功。
? The plan worked out badly. 计划进行很不成功。
【知识拓展】
work out的其他含义
(1)算出/做出
? The math problem is too difficult. I can’t work it out. 这道数学题太难了,我不能算出来。
(2)解决
? She worked out the problem with his help. 在他的帮助下,她解决了这个问题。
(3)制定
? We worked out a plan very soon. 我们很快就制订出一项计划。
【注意】 work out是动副结构,代词作宾语时,应放在work out中间。
你想的那个计划很有用,我现在已经解决了困难。
The plan that you came up with _____________ _____________ _____________ and I have solved the problem.
【答案】worked out fine
基础训练
I. 单词拼写
1. No one can expect how many (困难)he will meet in his life.
2. Peter stood up and (提)water for the old woman.
3. Different people have different (兴趣).
4. The healthy people can hardly understand what it is like to be (有残疾的).
5. The (失明的)girl can take care of herself.
6. Your English is poor. I’m afraid you need lots of ________ (训练).
7. People can’t i________ how he lived without food those days.
8. Thanks to you, I ________ (理解) the article in the end.
II. 用括号内所给单词的适当形式填空
1. Miss Gao is a good teacher. She shows her love and ________ (kind) to us.
2. After two months of ________ (train), I can swim freely.
3 Let’s raise money to help ________ (disable) people.
4. At last he ________________(understand) what I said.
5. We met many ________(difficult) when traveling in desert.
7. The clean water makes it possible for different kinds of fishes ________ (live) in this river.
6. It was a good ________ (feel) to be arriving home again.
7. Who’s the ________ (own) of this house??
8. Careful! There’s _________ (break) glass on the floor.
III. 用方框中所给短语的适当形式填空
run out of,take after,give away,fix up,be similar to
1. I like to have friends who _____________ me.
2. We’ll _____________ the old television before we can sell it.
3. Dave can’t buy the new computer because he has _____________ money.
4. Lisa _____________ her mother. They are both outgoing.
5. My uncle has decided _____________ all his money to charity.
Ⅳ. 根据汉语意思完成句子,每空一词
1. 父亲的话对他的一生影响很大。
His father’s words ________ ________ ________ ________ ________ his life.
2. 孩子们对这个故事感到很激动。
The children__________ __________ __________ the story.
3. 这台机器坏了,我们不能修理了。
The machine was ________ and we couldn’t ________ ________ ________.
4. 聪明的男孩想出了一个主意来搬这个重箱子。
The ________ boy________ ________ ________ an idea ________ ________ the heavy box.
5. 由于老太太的善良,她的情绪变化了。
Her moods changed ________ ________ the old woman’s ________.
6. 非常感谢你帮我走出了困境。
Thank you very much for ________ ________ ________.
7. 拥有一份我喜爱的工作我感到幸运。
I ________ ________ to have a job that I love.
8. 宇宙飞船使去月球旅行成为可能。
The spaceship________ ________ ________ to travel to the moon.
9. 跑了好长的路,汽油用完了。
After a long run, the gasoline ________ ________.
10. 教育对他的生活有很大影响。
Education ________ a ________ ________ to his life.
V. 单项选择
1. The little boy was so that he solved the hard math problem in such a short time.
A. lazy B. sad C. clever D. strong
2. It no difference who will go there.
A. takes B. makes C. gives D. carries
3. If you want to change the world, you have to yourself first.
A. enjoy B. check C. help D. change
4. —What should we do for the disabled children in the Children’s Home?
—You’re supposed to a study group to help them.
A. take up B. fix up
C. set up D. stay up
5. Look at the picture. Tom doesn’t his father at all. He is similar to his mother.
A. take off B. take after
C. take out D. take away
6. Jimmy has sixteen broken bikes to repair and give away to the kids who don’t have bikes.
A. fix up B. get up
C. make up D. cheer up
7. The Internet is so closely connected with(联系紧密)our daily life. Can you a life without it?
A. understand B. imagine C. hope D. expect
8. Though very tired, some of the students still keep their eyes in breaks.
A. opened B. close C. closed D. open
9. —What are you packing so many books for, Grandma?
—I’ll to the kids in West China.
A. give them up B. give them away
C. give them off D. give them in
10. —Hi, Mary. You look .
—Yeah, I’m going to America with my parents for a vacation.
A. kind B. moved C. excited D. sad
能力提升
I. 完形填空
Mary is a kind girl.From middle school to college,she volunteered to help many people.She often goes to the hospital to ___1__ the sick people on weekends. And she really felt __2__ because she understands that true happiness comes from helping__3__.
For three years,Mary went to a primary school once a week to __4__ some pupils with math and English. She can still remember the __5__ of being a teacher. Most of all,she was happy that the pupils did very __6__ in the math tests.
She felt good to be __7__ the children. They liked to tell her their dreams or future plans. She became not only their after-school __8__ but also their best friend.
Looking back now,she learned much __9__ from the three years' experience than she gave to the children. She's planning __10__ on volunteering in the future,because she knows it'll bring her more happiness.
1.A. cheer up B. set up C. think up D. clean up
2.A. funny B. angry C. happy D. sad
3.A. another B. others C. the other D. the others
4.A. learn B. tell C. meet D. help
5.A. feeling B. looking C. tasting D. smelling
6.A. good B. nice C. well D. kind
7.A. for B. with C. of D. by
8.A. brother B. sister C. worker D. teacher
9.A. more B. less C. better D. worse
10.A. going B. coming C. to go D. to come
II. 阅读理解
Chores weren’t popular at my house. My children didn’t like to do chores. They always saw me do chores,but they hardly ever helped me do them.
A year ago, I made a game called"The Endless Chore Game". It’s really great. Here’s how the game works.
I make a card with forty squares(方框), and I write a different chore on each square. These chores can be easy and interesting like making dessert. Then my family roll the dice(骰子)to decide what chores we have to do. The card also has a few squares with fun things, like watching TV and singing. If you’re lucky, you can watch TV when the others are doing the chores.
My son likes the game very much. He goes to the kitchen happily every morning to do the game. It’s really a good way to make my children do chores. You can have a try if you have the same problem as me.
1. The writer’s family began to do the game________ago.
A. one year B. one month
C. two years D. two months
2. What do you need to do"The Endless Chore Game"?
A. A card. B. A dice.
C. A card and a dice. D. A card and forty dice.
3. When do the writer’s family do the game?
A. In the morning. B. In the afternoon.
C. In t he evening. D. The other day.
4. We can learn from the passage that________.
A. the writer only has one child
B. everyone in the writer’s family likes playing the game
C. the writer wrote this passage to the parents
D. everyone in the writer’s family has to do the chor es every day
5. The writer made this game to________.
A. do less chores B. tell us an interesti ng game
C. make her children happy D make her children do ch ores
III. 词语运用
阅读短文,从方框中选择恰当的词并用其适当形式填空,使短文完整、通顺。每词限用一次,其中有两个词是多余的。
as, sound, they, clever, send, imagine, heavy, hear, lucky, know, if, follow
Mr. and Mrs. Brown were farmers in?South Australia. They lived there for many years. They had a kangaroo (袋鼠) in (小题1) family. The kangaroo was called Lulu. Several years ago, Mr. Brown’s son gave Lulu to him (小题2) a gift for his 60th birthday. Soon Mr. Brown and Lulu became good friends and Lulu often (小题3) him around the farm.
One day when Mr. Brown was working on his farm, a(n) (小题4) tree branch (树枝) fell on top of him suddenly (突然). Mr. Brown fell to the ground (地面) and didn’t (小题5) what happened next. Lulu stood next to Mr. Brown’s body. She started barking (叫) and didn’t leave Mr. Brown. “She (小题6) like a dog. She barked and barked. And she didn’t stop,” said Mrs. Brown. After (小题7) Lulu’s barks, Mrs. Brown quickly went to see what had happened. She saw Mr. Brown lying on the ground and (小题8) him to the hospital right away. (小题9), Mr. Brown was saved.
“Lulu is great!” said Mr. Brown. “She saved me! She is a friendly and very (小题10) kangaroo.” After Mr. Brown left the hospital, he took Lulu everywhere he went.
真题练习
1.(2019·西宁)A smart phone makes a big _____________ to our life.
A. difference B. decision C. progress D. prediction
2.(2019·江苏徐州)The teacher encourages the children to feel _____________ about asking questions when they don’t understand.
A. nervous B. confident
C. excited D. practical
3.(2019·贵州黔东南州)You speak too fast, Mr. Lee. Most of us can’t follow you.
A. look B. listen
C. know D. understand
4.(2019·黑龙江龙东)When the boy heard the words, his face _____________ red.
A. got B. turned C. changed
5.(2019·湖北恩施州)The _____________ show on Zhejiang TV, Running Men, makes lots of people _____________.
A. interesting;relaxing B. interesting;relaxed C. interested;relaxed
6.(2019·山东烟台)His uncle would rather _____________ the old bike than _____________ a new one.
A. repair;to buy B. to repair;buy
C. repair;buy D. to repair;to buy
7.(2019·江苏常州)Life is a journey with trouble, but with care and wisdom you can _____________ any problem you face.
A. work out B. hand out
C. find out D. put out
参考答案
基础
I. 单词拼写
1.difficulties 2.carried 3. interests 4.disabled 5.blind
1.training 3.imagine 4.understood
II. 用括号内所给单词的适当形式填空
1.kindness 2.training 3. disabled 4.understood
5. difficulties 6. feeling 7. owner 8. broken
II. 用括号内所给单词的适当形式填空
1.broken 2.working 3.training 4. kindness 5.understood
6. disabled 7. to live 8. difficulties
III. 用方框中所给短语的适当形式填空
1. are similar to 2. fix up 3. run out of 4. takes after 5. to give away
Ⅳ. 根据汉语意思完成句子,每空一词
1.made a big difference to 2.were excited about 3. broken; fix it up
4.clever; came up with; to carry 5. because of; kindness 6.helping me out 7.feel lucky
8. makes it possible 9.ran out 10. makes; big difference[
V. 单项选择
1. C 【解析】lazy懒惰的;sad 难过的;clever聪明的;strong强壮的。句意:这个小男孩是如此聪明,他在这么短的时间内做出了这道数学难题。故选C
4. C 【解析】考查动词短语辨析。句意:——我们应该为儿童福利院的残疾儿童做些什么呢?——你们应该成立一个学习小组去帮助他们。take up占据;fix up修理;set up 建立,成立;stay up 熬夜。与"学习小组"搭配的动词应该是"成立",故选C。
5. B 【解析】考查动词短语的辨析。take off"起飞",take after"长得像",take out"取出",take away"带走"。句意:看这张照片。汤姆一点儿都不像他的爸爸,他长得像他妈妈。故选B。
6. A 【解析】考查短语辨析。fix up=repair修理;get up起床;make up编造;cheer up使高兴起来。句意:吉米有16辆坏了的自行车要修理然后捐给没有自行车的孩子。故选A。
7. B 【解析】understand理解;imagine想象;hope希望;expect期望。句意:因特网与我们的日常生活联系如此紧密。你能想象没有它的生活吗?故选B。
9. B 【解析】考查动词短语辨析。句意:——奶奶,你打包这么多书要做什么?——我将捐赠给中国西部的孩子们。give up放弃;give away捐赠;give off发出;give in屈服。故选B。
10. C 【解析】kind善良的;moved感动的;excited兴奋的;sad伤心的。由答语中的要和父母去美国度假可知是兴奋的,所以选C。
能力
I. 完形填空
【文章大意】Mary是一个善良的姑娘,从中学到大学她自愿去帮助许多人,她常常在周未去医院鼓励病人,她感觉到幸福来自对别人的帮助。三年来她每周去一次一所小学帮助孩子们学习数学和英语,她感觉和孩子们在一起很幸福,她不仅是孩子们课下的老师,也是孩子们的朋友。她计划在将来做志愿者工作。
1.A 【解析】句意:她经常在周末去医院让病人振作起来。A. cheer up振作起来;B. set up建立;C. think up 想出;D. clean up打扫。结合句意,答案为A。
2.C 【解析】句意:她真的很高兴,因为她明白真正的幸福来自于帮助别人。A. funny滑稽的;B. angry生气的;C. happy高兴的,幸福的;D. sad悲伤的。结合后面的句意,真正的幸福来自对别人的帮助,故答案为C。
3.B 【解析】句意:她真的很高兴,因为她明白真正的幸福来自于帮助别人。A. another再一个,B. others其余的,后面不能再跟名词;C. the other两者中的另一个;D. the others其余的,全部。此处是泛指,用others指代other people,故答案为B。
4.D 【解析】句意:玛丽每周去一次小学,帮助一些学生学习数学和英语。A. learn学习;B. tell告诉;C. meet遇见;D. help帮助。help sb. with在……方面帮助某人,故答案为D。
5.A 【解析】句意:她仍然记得当老师的感觉。A. feeling感觉;B. looking看;C. tasting品尝;D. smelling闻到。结合句意可知,答案为A。
6.C 【解析】句意:他很高兴学生们在数学考试中表现得很好。A. good好的;B. nice美好的,愉快的;C. well 好地;D. kind善良的。do well in在……方面学的好,结合句意,答案为C。
7.B 【解析】句意:和孩子们在一起,她感到很高兴。A. for为了;B. with与……一起;C. of……的;D. by被。be with sb.与某人在一起,故答案为B。
10.C 【解析】句意:她打算将来继续做志愿者。plan to do sth.计划做某事;go on doing sth.继续做某事,故答案为C。
II. 阅读理解
1. A 【解析】细节理解题。由第二段第一句:A year ago, I made a game called"The Endless Chore Game". 可知,他们是从一年前开始做此游戏的。故选A。
2. C 【解析】推理判断题。根据第三段,做这个游戏,需要在一张卡上的方框里写上要做的家务,然后掷一个骰子决定做什么家务,即需要一张卡和一个骰子。故选C。
3. A 【解析】细节理解题。由最后一段第二句:He goes to the kitchen happily every morning to do the game. 可知,他们每天早上做这游戏决定谁做哪些家务。故选A。
4. C 【解析】推理判断题。由短文最后一句:You can have a try if you have the same problem as me. 如果你有和我一样的问题,你可以试一试。作者是在告诉其他家长,在孩子不做家务时,可以试试他的办法。故选C。
5. D 【解析】推理判断题。由短文倒数第二句话:It’s really a good way to make m y children do chores. 可知,作者的目的是让孩子们在愉快的游戏中帮忙完成家务。故选D。
III. 词语运用
【文章大意】这是一篇记叙文,讲述了布朗先生和袋鼠露露成为了好朋友,并在一次意外中为它所救的故事,表现了人和动物的和谐相处。
1. their 【解析】in one's family在家里;根据句意语境,可知填their。
2. as 【解析】for his 60th birthday为他的六十大寿;as a gift作为礼物;根据句意语境,可知填as。
3. followed 【解析】follow sb.跟着某人;根据句意语境,结合短文时态,可知填followed。
4. heavy 【解析】tree branch树枝,需用形容词修饰;根据下文Mr. Brown fell to the ground,结合句意语境,可知填heavy。
8. sent 【解析】send him to the hospital送某人去医院;and连接的是并列结构,根据句意和前面的saw,可知填sent。
9. Luckily 【解析】be saved获救;根据句意语境,可知填Luckily。
10. clever 【解析】very非常,副词修饰形容词;kangaroo名词,需用形容词修饰;根据句意语境,可知填clever。
真题
1.A 【解析】句意:一部智能手机给我们的生活带来很大的影响。difference不同;decision决定;progress进步;prediction预言。make a big difference = make much difference 造成很大影响,故选A。
2. B 【解析】句意:那名老师鼓励孩子们当他们不懂的时候,要对问问题感到有信心。nervous紧张;confident有自信的;excited激动的;practical实用的,feel confident about对……感到有信心,故选B。
3. D 【解析】句意:你讲得太快了,李老师。我们大多数人不能跟上你。A. look看,看起来;B. listen听,听起来;C. know知道;D. understand懂得,理解。跟不上,因为讲得太快,所以理解不了。故选D。
4. B 【解析】句意:当男孩听了这些话,他的脸变红了。A. got变得;B. turned变得;C. change改变,变化。与颜色连用时,用turn。故选B。
5. B 【解析】句意:浙江电视台有趣的的节目《跑男》使许多人感到轻松。interesting有趣的;interested感兴趣的;relaxing令人放松的;relaxed感到轻松的。-ed形容词表示人的感受,-ing形容词表示物的性质和状态。所以选B。
6. C 【解析】句意:他舅舅宁愿修旧自行车也不愿买新的。"宁愿……也不愿……":would rather…than…宁愿做……而不愿做……。would rather是情态动词,后跟动词原形,与其比较的另一个放在than后的动作也要用动词原形的形式。故选C。
7. A 【解析】句意:生命就像一场有麻烦的旅行,只有用关心和智慧,你才能够解决你所面对的任何问题。work out解决,算出;hand out分发;find out找出;put out扑灭。我们需要解决所面对的生活中的问题,用work out。故选A。