Unit2 Water B卷·能力提升（含解析）

Unit 2（B卷·提升能力）
学校:________ 姓名：________班级：________考号：________
一、单项选择
1．—Do you know anything about Zhang Guimei
—________ She is a headmaster and owns the title “Role Model of the Times”.
A．How come B．So what C．Of course. D．All right.
2．Our living room is very dirty. Please ________ at once.
A．clean it up B．clean up it C．clean up them D．clean them up
3．Remember to ________ the lights when you leave the classroom.
A．get off B．cut down C．turn off D．think of
4．My father has a habit of running ________ the Yanhe River every morning.
A．on B．along C．across D．between
5．Are you going to have a “helping hands” meeting ________ the community centre _______ this Sunday morning
A．at, / B．on, / C．in, on D．/, /
6．—Hi, Jane! ________
—Not much, just looking around.
A．How are you doing B．What are you doing
C．Where are you from D．How much is it
7．—Chocolate cake is a kind of .
—Yes, it’s very sweet. And I like it very much.
A．tool B．vegetable C．fruit D．dessert
8．He usually goes to work ________ the bike. Sometimes he ________ a taxi.
A．with; on B．on; takes C．on; with D．by; takes
9．My father ________ buy a new watch ________ my birthday.
A．want; at B．wants to; in
C．want to; on D．wants to; for
10．—How ________ will the meeting start
—________ 8 o’clock.
A．soon; Until B．long; Until
C．long; Not until D．soon; Not until
二、短文选词填空
将下列单词或词组填入空格。每空格限填一词每词只能填一次
A. hides B. in fact C. true D. or E. record
Nobody likes a computer virus, but at least you can get rid of it. And there is a lot of anti-virus （病毒） software these days. It can find a virus, fix it and you can forget about it. Unluckily the same isn’t 11 for spyware.
What is spyware It is software that 12 somewhere on your computer. It collects information about what you do on the Internet and passes the information on companies without your permission （允许）. If you shop on the Internet and use your credit card, you should know that some spyware will 13 the information.
Your computer can catch spyware through lots of ways. If you open the wrong email, 14 you visit the wrong website, spyware can download itself onto your computer. And spyware often comes with free software.
A. quietly B. are connected to C. allows D. problems E. slower
Most spyware just collects information about your surfing habits for advertising reasons. But some spyware can be more powerful and will often make your computer 15 . “Adware” is a type of spyware which is advertising software. It makes advertisements appear now and then while you 16 the Internet. Not dangerous, but very annoying （令人心烦的）.
If this is the first time you’ve heard of spyware, you’ve probably got some on your PC. Surveys （调查） have found that 90% of computers have several pieces of spyware on them. And spyware will stay on your computer for a long time, 17 collecting information and sending it back to its owners.
There is some anti-spyware software that will remove most of your 18 . However, some anti-spyware software is spyware itself, so be careful.
三、用所给单词的正确形式填空
19．For the difficulties ahead, Mr. Black talked to them one by one. (impatient)
20．Peter doesn’t know how to with the monster. （communication）
21．The farmers used many to kill the insects. (chemistry)
22．Air, fire and water are all elements. （nature）
23．Could you please report the accident （brief）
24．We all hope to have more free time (relax).
25．My mother told me (clean) up the room.
Complete the following sentence as required.（根据所给要求完成句子）
26．A helicopter flies over us. (改为一般过去时)
Yesterday a helicopter over us.
27．“Are articles with pictures more attractive than those with only words ” the editor asked. (连接成宾语从句)
The editor asked articles with pictures more attractive than those with only words.
28．Students ought to queue up properly during the visit. (改为否定句)
Students to queue up properly during the visit.
29．Don’t play in the fountains or sleep on the benches. (保持句子意思不变)
It is play in the fountains or sleep on the benches.
30．began, two centuries ago, over, Benjamin Franklin, his experiments on electricity (连词成句)
.
五、阅读单选
Here comes the Year of the Tiger! For our Chinese people, the tiger is the king of all the animals. Let’s know more about tigers.
Tigers in old times
Some great generals(将军) in China were called the “tiger generals”. A tiger-shaped tally called hufu(虎符) could give generals great power. It’s made up of two halves. The king kept the right half. And he gave the left half to the general. If the two halves were put together, the general could move and army(军队).
_________
Chinese believe this big cat can protect them and make them stronger. People make tiger hats and shoes for babies. Parents hope their kids will grow to be as strong as little tigers. People also make cloth tigers during Dragon boat Festival. It is said that the “tigers” could “eat up” the bad animals and keep them safe.
Tigers in the west
In the West, lions, not tigers are seen as the king of all animals. Brave warriors(勇士) were called “the lion”. England’s King Richard I is known as “the Lion heart”. Lion is also a symbol for England and 13 other countries in Europe.
But in the West, tigers are also seen as very powerful animals. In English, if you want someone to cool down, you can say to them “Easy tiger”. Another one is:“Eye of the tiger”. It means to have fierceness(凶猛) and being strong.
By Hannah, Wuhan Daily
31．In which section(板块) of the newspaper can we/read the news ________
A．SCIENCE STUDY
B．WORLD CULTURE(文化)
C．SCHOOL ZONE(区域)
D．NEWS DESK
32．What would be a good heading(标题) for the second part ________
A．Tigers in everyday life.
B．Tigers in war(战争).
C．Tigers are powerful.
D．Tigers in the east.
33．If you want to make your English friend less angry, you can say ________.
A．The lion heart. B．Eye of the tiger.
C．Easy tiger. D．A big cat.
34．From the news above, we know that “________”.
A．The tiger is the king of all the animals.
B．Hufu is made up of two halves.
C．All people make cloth tigers during Dragon Boat Festival.
D．The lion is a symbol for 13 countries in Europe.
35．Hannah from Wuhan Daily probably wants the readers to ________.
A．see lions in England
B．protect tigers
C．open up their eyes
D．learn more about the old times
六、完形填空
Is your family interested 36 a dog A dog can be a good friend of your family, but if you choose the 37 kind of dog, it can cause a lot of trouble.
Families should sit down and discuss the problem before buying a dog. 38 the children in your family are the ones who want the dog, the parents are the ones who are really responsible for seeing that the animal is properly cared for. If you don’t know much about dogs, it’s a good idea to go to the library 39 books about different kinds of dogs, 40 books about how to train a young dog. Dogs of different kinds change in popularity （流行） as the years go by. One of the most popular dogs these years is the German shepherd （牧羊犬）. This is because it provides protection. The family should be warned that these dogs grow up to be very big, and may be too powerful for children. If your house is not big, a toy dog may be a good choice. These dogs are very small and easy to train and they 41 be walked daily.
36．A．to buying B．buying C．in buying D．buy
37．A．right B．wrong C．correct D．true
38．A．Although B．But C．When D．Even if
39．A．for B．about C．on D．at
40．A．as well B．as well as C．too D．also
41．A．need to B．need C．didn’t to D．don’t need to
七、短文首字母填空
What do three hearts, eight arms, and one huge brain add up to An octopus(章鱼)—a sea a 42 that can do amazing(令人惊奇的) things.
Octopuses are very smart. They can learn new things just like humans. They’ve even learned a few skills to get themselves out of dangerous situations (情况). Octopuses don’t have teeth or sharp claws(爪子) to protect themselves. I 43 , they use more clever ways to fool their enemies. Octopuses like to hide themselves in the sand. An octopus can change the colour of its skin to make it look like sand. And this colour change happens i 44 less than a minute. A 45 way an octopus can hide is by shooting ink. The ink is like a cloud that hides the octopus. By the time the ink clears the octopus has swum away.
If an octopus is in d 46 , it can also make itself look like a sea snake. It will hide itself in the sand, leaving two arms outside. It will change the colour of those arms to match a sea snake.
But what will octopus do if there’s no time to hide It can b 47 off one of its arms.The arm will then change colours and keep moving around in the water to take the enemy’s(敌人) attention away. At the same time, the octopus swims away to safety. Don’t worry though. The arm will g 48 back.
八、阅读回答问题
How Are Typhoons Named
Most typhoons form (形成) between June and November. They all have special and interesting names, such as Wukong (Monkey King), Shanshan (a girl’s name) and Mangkhut (山竹). Do you know how typhoons get their names
At first, most major typhoons were named by a system of latitude-longitude numbers (经纬度数). It helped scientists track these storms. However, this kind of names were too difficult for common people to remember.
Now, the World Meteorological Organization (世界气象组织) has a list of names for typhoons. There are 140 names on the list. When a typhoon comes, it is named according to the order of names on the list. These names are submitted (提交) by 14 countries and regions along the northwestern Pacific Ocean coast (西北太平洋沿岸), including China, Japan and Thailand. If a typhoon causes huge damage (造成巨大的破坏), its name will be retired from the list, and a new-name will he added.
Naming typhoons helps people remember the storms, talk about them more effectively and stay safer when they come.
49．When do most typhoons form
50．How did common people think of the names of most major typhoons at first
51．How many names of typhoons are there on the list of the World Meteorological Organization
52．What will happen if a typhoon causes huge damage
53．What does naming typhoons help people do
九、材料作文
54．Write at least 60 words on the topic “Water is of great importance”, using the following questions for reference.（请根据提示问题，以“水很重要”为题，写一篇短文不少于60个词，标点符号不占格）
（1） Do you think water is important
（2） What can we use water for
（3） How can we save water
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
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参考答案：
1．C
【详解】句意：——你了解张桂梅吗？——当然。她是一名校长，拥有“时代模范”的称号。
考查情景交际。How come 怎么会？So what 那又怎样？Of course.当然。All right.好的。根据“She is a headmaster and owns the title ‘Role Model of the Times’.”可知此处表示当然知道张桂梅。故选C。
2．A
【详解】句意：我们的客厅很脏。请马上打扫干净。
考查动副结构中代词的位置。根据“Our living room is very dirty.”可知，主语是单数，因此代词用it，排除选项CD；clean up为动副结构，代词it应放短语中间，作宾语。故选A。
3．C
【详解】句意：当你离开教室时记得关灯。
考查动词短语辨析。get off下车；cut down砍倒；turn off关；think of想起。根据“when you leave the classroom”可知应是关灯，故选C。
4．B
【详解】句意：我父亲有每天早上沿着延河跑步的习惯。
考查介词。on在上面；along沿着；across穿过；between在两者之间；根据“the Yanhe River ”可知，这里表示“沿着”河，所以是along。故选B。
5．A
【详解】句意：这个星期天早上你要在社区中心开一个“援助之手”会议吗？
考查介词用法。at在；on在……上面；in在……里。表示在“社区中心”，应使用介词at。this Sunday morning的前面不使用介词，当星期前面有指示代词修饰时，不用介词。故选A。
6．B
【详解】句意：——嗨，简！你在做什么啊？——没什么，只是四处看看。
考查交际用语。How are you doing你好吗；What are you doing你在干什么；Where are you from你来自哪里；How much is it多少钱。根据答语的意思可知询问的内容是“你在干什么”，选项B符合。故选B。
7．D
【详解】句意：——巧克力蛋糕是一种甜点。——是的，它非常甜。我非常喜欢。
考查名词辨析。tool工具；vegetable蔬菜；fruit水果；dessert甜点。根据“Chocolate cake”可知，巧克力蛋糕是一种甜点。故选D。
8．B
【详解】句意：他通常骑自行车上班。有时他坐出租车。
考查介词辨析和动词短语。with带有；on在……上；by乘坐。根据“the bike”可知骑自行车是坐在上面，应用on，排除AD选项；第二空应填谓语动词，排除C选项，taxi a taxi“乘出租车”。故选B。
9．D
【详解】句意：我爸爸想买一块新手表作为我的生日礼物。
考查动词短语和时态以及介词辨析。want sth想要某物；want to do sth想要做某事；时态是一般现在时，主语是“My father”，动词用三单，排除A、C。in在里面；for当作。根据“buy a new watch...my birthday”可知，买手表是当作生日礼物，故选D。
10．D
【详解】句意：——会议还要多久才开始？——直到八点。
考查特殊疑问词和时间介词。soon很快，马上，不久；how soon多久以后，答语为时间点；long长的；how long多长时间，答语为时间段；until直到，直到……（才结束）；not until直到……才（开始）。根据“will”和“the meeting start”可知，此处答语为一个时间点，所以提问时要用how soon；根据问句“How soon will the meeting start ”可知，是在问会议多久以后才开始。所以第二个设空处指的是“直到八点（才开始）”，故应用Not until。故选D。
11．C 12．A 13．E 14．D 15．E 16．B 17．A 18．D
【导语】本文介绍了电脑上的间谍软件是如何记录我们的信息，并给我们带来困扰的。
11．句意：不幸的是，间谍软件却不是这样。根据句子中的“Unluckily”可知，对于间谍软件，上述的处理方法是“不正确的”。故选C。
12．句意：它是藏在你电脑某处的软件。分析句子结构可知，这是定语从句，空格处是从句中的谓语动词，结合备选单词可知，hides“隐藏”符合题意。故选A。
13．句意：如果你在网上购物并使用信用卡，你应该知道一些间谍软件会记录信息。分析句子结构，这是宾语从句，空格处是从句中的谓语动词，结合备选词汇可知，间谍软件会“记录”你的信用卡信息符合题意。故选E。
14．句意：如果你打开了错误的电子邮件，或者你访问了错误的网站，间谍软件就会自动下载到你的电脑上。“you open the wrong email”和“you visit the wrong website”是表示并列的两个句子，所以用并列连词or表示“或者”。故选D。
15．句意：但是一些间谍软件可能更强大，并且经常会使您的计算机变慢。make sth+形容词，“使……处于某种状态”，结合备选词汇，形容词slower，使你的电脑“更慢”符合题意。故选E。
16．句意：当您连接到互联网时，它会不时地显示广告。分析句子结构，这里缺少谓语动词，结合备选词汇，are connected to“连接”网络符合题意。故选B。
17．句意：而间谍软件会在你的电脑上停留很长一段时间，悄悄的收集信息并发还给它的主人。分析句子结构，用来修饰动词collecting，所以用副词，所以quietly“悄悄地”符合题意。故选A。
18．句意：有一些反间谍软件可以解决你的大部分问题。根据句子中的“anti-spyware software”可知，他们可以解决你大部分的病毒“问题”。故选D。
19．patiently
【详解】句意：关于前面的困难，布莱克先生耐心地一个一个地和他们谈。impatient“不耐烦的”，根据“Mr. Black talked to them...one by one”可知是指耐心地交谈，且此处是修饰动词，应用副词。故填patiently。
20．communicate
【详解】句意：彼得不知道如何与怪物交流。communication“交流”，是名词，此处位于动词不定式后，应用动词原形communicate。故填communicate。
21．chemicals
【详解】句意：农民使用很多的化学药品来杀死昆虫。根据“The farmers used many... to kill the insects”可知，此处是指化学药品，chemical“化学药品”，many后跟名词复数。故填chemicals。
22．natural
【详解】句意：空气，火和水都是自然元素。这里用来修饰空后的名词“nature”，所以用形容词修饰名词，nature形容词是natural“大自然的”。故填natural。
23．briefly
【详解】句意：你能简要报告一下事故吗？修饰动词report用副词形式，表示“简要地”。故填briefly。
24．to relax
【详解】句意：我们都希望有更多的空闲时间来放松。relax“放松”，动词。空处作后置定语修饰名词time，所以用动词不定式。故填to relax。
25．to clean
【详解】句意：我妈妈叫我打扫房间。tell sb to do sth“告诉某人做某事”，故填to clean。
26．flew
【详解】句意：一架直升机从我们上空飞过。一般过去时态，谓语动词为动词过去式，fly过去式为flew。故填flew。
27． whether##if were
【详解】句意：编辑问道：“有图片的文章比只有文字的文章更有吸引力吗？”。把一般疑问句变为宾语从句，用引导词whether/if，主句谓语asked是一般过去时，宾语从句的谓语用一般过去时，因此把are变为were。故填whether/if；were。
28． ought not
【详解】句意：学生在参观期间应该正确地排队。ought to为情态动词，其否定形式为ought not to。故填ought；not。
29． not right to
【详解】句意：不要在喷泉里玩或者在长椅上睡觉。根据题干可知，改为同义句可表达为“在喷泉里玩和在长椅上睡觉是不对的”，用句型It is not right to do sth“做某事是不对的”，故填not；right；to。
30．Benjamin Franklin began his experiments on electricity over two centuries ago
【详解】根据所给标点可知应用陈述句的形式，分析所给单词，Benjamin Franklin作主语；began作谓语；his experiments on electricity作宾语；over two centuries ago作时间状语，放句末。故答案为：Benjamin Franklin began his experiments on electricity over two centuries ago“本杰明·富兰克林在两个多世纪前开始了他的电学实验”。
31．B 32．C 33．C 34．B 35．C
【导语】本文通过虎年介绍了老虎在中国古代的一些象征，以及人们对老虎的看法，同时也介绍了在西方社会中老虎的相关文化。
31．文章出处题。根据“Here comes the Year of the Tiger! For our Chinese people, the tiger is the king of all the animals. Let’s know more about tigers.”可知虎年到了！对我们中国人来说，老虎是动物之王。让我们更多地了解老虎。以及小标题“Tigers in old times”古代的老虎，和“Tigers in the west”西部的老虎，可知，我们可以在报纸的世界文化版面看到这条新闻。故选B。
32．段落大意题。根据“Chinese believe this big cat can protect them and make them stronger…Parents hope their kids will grow to be as strong as little tigers…It is said that the “tigers” could “eat up” the bad animals and keep them safe.”可知中国人相信这只大猫可以保护它们，让它们更强壮。父母希望他们的孩子能像小虎一样强壮。据说“老虎”可以“吃掉”坏动物并保护他们的安全。可知，这一部分主要讲了老虎的强大。所以第二部分的最好标题是“Tigers are powerful”。故选C。
33．推理判断题。根据“In English, if you want someone to cool down, you can say to them “Easy tiger”.”可知在英语中，如果你想让某人冷静下来，你可以对他们说 “Easy tiger”，因此，如果你想让你的英国朋友少生气，你可以说“Easy tiger”。故选C。
34．细节理解题。根据“It’s made up of two halves.”可知它由两个半块组成。选项B符合。故选B。
35．推理判断题。根据“Here comes the Year of the Tiger! For our Chinese people, the tiger is the king of all the animals. Let’s know more about tigers.”可知虎年到了！对我们中国人来说，老虎是动物之王。让我们更多地了解老虎。《武汉日报》的汉娜写这篇文章可能想让读者开阔眼界。故选C。
36．C 37．B 38．A 39．A 40．B 41．D
【导语】 本文介绍了养狗前如何正确选择狗的种类。
36．句意：你的家人有兴趣买狗吗？
to buying买，介宾结构；buying买，动名词形；in buying买，介宾结构；buy买，原形。根据空前的interested可知，这里用到短语be interested in“对……感兴趣的”，in是介词，后跟动名词。故选C。
37．句意：一只狗可以是你家人的好朋友，但是如果你选错了狗的种类，它会带来很多麻烦。
right正确的；wrong错误的；correct正确的；true真实的，正确的。根据后文“it can cause a lot of trouble”可知，这里表示选“错”了狗的种类。故选B。
38．句意：虽然你家的孩子想要这只狗，但父母才是真正负责确保这只动物得到妥善照顾的人。
Although虽然；But但是；When当……时候；Even if虽然。前半句“the children in your family are the ones who want the dog”和后半句“the parents are the ones who are really responsible for seeing that the animal is properly cared for”有转折关系，所以此处用Although引导让步状语从句，表示“虽然，尽管”。故选A。
39．句意：如果你不太了解狗，去图书馆找关于不同种类的狗的书，以及关于如何训练幼犬的书是个好主意。
for为了，表目的；about关于；on关于；at在某一地点。“books about different kinds of dogs”是去图书馆的目的。故选A。
40．句意：如果你不太了解狗，去图书馆找关于不同种类的狗的书，以及关于如何训练幼犬的书是个好主意。
as well也，用于句尾；as well as和，用来连接两个并列成分； too也，用于肯定句句尾；also也，用于句子中间。这里用来连接“books about different kinds of dogs”和“books about different kinds of dogs”两个并列的成分。故选B。
41．句意：这些狗非常小，容易训练，它们不需要每天散步。
need to需要，后跟动词原形；need需要，原形；didn’t to错误结构；don’t need to不需要。根据“These dogs are very small and easy to train and they…”可知，这里应该是养小狗的好处，“不需要”每天遛狗，所以是don’t need to do。故选D。
42．(a)nimal 43．(I)nstead 44．(i)n 45．(A)nother 46．(d)anger 47．(b)reak 48．(g)row
【导语】本文讲述了章鱼脱离危险的技能。
42．句意：一只章鱼——一种能做惊人事情的海洋动物。根据“An octopus(章鱼)”结合首字母可知，章鱼是一张海洋动物，animal“动物”符合语境，故填(a)nimal。
43．句意：相反，他们用更聪明的方法来愚弄敌人。根据“Octopuses don’t have teeth or sharp claws(爪子) to protect themselves...they use more clever ways to fool their enemies”结合首字母可知，章鱼没有牙齿或锋利的爪子来保护自己。相反，他们用更聪明的方法来愚弄敌人。instead“相反”，副词，故填(I)nstead。
44．句意：这种颜色的变化发生在不到一分钟的时间里。根据“less than a minute.”以及首字母提示可知此处应用介词“in+一段时间”的结构，故填(i)n。
45．句意：章鱼的另一种隐藏方式是射出墨水。根据“...way an octopus can hide is by shooting ink.”可知是指章鱼的另一种隐藏方式，another“另一个”符合语境，故填(A)nother。
46．句意：如果章鱼处于危险之中，它也可以让自己看起来像一条海蛇。根据“If an octopus is in...it can also make itself look like a sea snake. ”可知此处是固定结构in danger“在危险中”。故填(d)anger。
47．句意：它可以折断自己的一只手臂。根据“It can...off one of its arms”可知章鱼会把自己的手臂折断，break off“折断”符合语境，空前有情态动词can，动词用原形。故填(b)reak。
48．句意：手臂会长回来的。根据“Don’t worry though. The arm will...back.”可知，章鱼的手臂会长回来的，grow back“长回来”，空前有will，动词用原形。故填(g)row。
49．Most typhoons form between June and November. 50．However, this kind of names were too difficult for common people to remember. 51．There are 140 names on the list. 52．If a typhoon causes huge damage, its name will be retired from the list, and a new-name will be added. 53．Naming typhoons helps people remember the storms, talk about them more effectively and stay safer when they come.
【导语】本文主要介绍了台风是如何命名的。
49．根据“Most typhoons form (形成) between June and November.”可知大多数台风形成于六月至十一月之间。故填Most typhoons form between June and November.
50．根据“However, this kind of names were too difficult for common people to remember.”可知刚开始，这种名字对普通人来说太难记住了。故填However, this kind of names were too difficult for common people to remember.
51．根据“There are 140 names on the list”可知世界气象组织的名单上有140个台风的名字。故填There are 140 names on the list.
52．根据“If a typhoon causes huge damage (造成巨大的破坏), its name will be retired from the list, and a new-name will he added.”可知如果台风造成巨大破坏，其名称将从列表中删除，并添加一个新名称。故填If a typhoon causes huge damage, its name will be retired from the list, and a new-name will be added.
53．根据“Naming typhoons helps people remember the storms, talk about them more effectively and stay safer when they come”可知命名台风有助于人们记住风暴，更有效地谈论风暴，并在风暴来临时保持安全。故填Naming typhoons helps people remember the storms, talk about them more effectively and stay safer when they come.
54．例文
Water is of great importance
As we all know, water is of great importance because we can use it to do a lot of things. We can’t live without water.
At home, we use water to wash clothes, cook food, have showers and so on. We must drink water every day. At work, people use water to make things in factories.
However, we don’t have enough drinking water on the earth. So how can we save water First, we should use less water when we don’t need too much water. Second, try to reuse water. When we finish washing the clothes, we can use the water to clean the floor. At last, we can take a shorter shower. If we can do these things, we can save a lot of water.
【详解】[总体分析]
①题材：本文为一篇说明文；
②时态：时态为“一般现在时”；
③提示：写作要点已给出，考生应根据提示问题，以“水很重要”为题，写一篇短文不少于60个词。
[写作步骤]
第一步，开篇点题，表明水很重要，强调水的重要性；
第二步，具体阐述水的作用；
第三步，引出水资源缺乏，我们应该节约用水，并具体描述如何节约水。
[亮点词汇]
①a lot of许多，大量
②live without water离开水生存
③at last最后
[高分句型]
①As we all know, water is of great importance because we can use it to do a lot of things. （because引导的原因状语从句）
②When we finish washing the clothes, we can use the water to clean the floor.（when引导的时间状语从句）
③If we can do these things, we can save a lot of water.（if引导的条件状语从句）
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