选修七unit-3-同步练习.doc

Unit 3　Section Ⅱ
Ⅰ.单词拼写
1．He spent six months in prison before fleeing(逃离)the country.
2．The crowd yelled(大声叫)encouragement at the players.
3．The children learned about the relationship(关系)between the moon and the tides.
4．The report urged(敦促)that all children be taught to swim.
5．Snow forced many drivers to abandon(舍弃)their vehicles.
Ⅱ.短语填空
in the meantime；help out；aim at；sort out；ahead of
1．I tried to think about all the problems that were __________________ me tomorrow.
答案：ahead of
2．It is difficult to ____________________ the lies from the truth.
答案：sort out
3．Organizing the school trip will be a lot of work，so I need some volunteers to ____________________.
答案：help out
4．Your computer won’t be arriving till Thursday.________________，you can use Jude’s.
答案：In the meantime
5．This anti­smoking campaign is mainly ________________________________________
young teenagers
答案：aimed at
Ⅲ.单项填空
1．The grandparents ________ when they saw the gold medal their grandson had got at the Olympic Games.
A．couldn’t help to smile
B．couldn’t help smiling
C．couldn’t help but smiled
D．couldn’t help but smiling
解析：can’t help doing sth.“情不自禁做某事”。can’t help to do sth.“无法帮助做某事”；can’t help but do sth.“不得不做某事”。
答案：B
2．Put the kettle on to boil and ________ we’ll cut the bread.
A．in other words　　　　 B．on the other hand
C．in the meantime D．on the contrary
解析：句意：把水壶放上去烧水，与此同时我们切面包。in other words换言之；on the other hand另一方面；in the meantime与此同时；on the contrary相反。故C项符合句意。
答案：C

3．Whenever she heard that someone had trouble，she would go to ________.
A．find out B．work out
C．carry out D．help out
解析：句意：每当听说有人有困难时，她都会去帮助解决。help out“帮助摆脱困境或危险”，符合题意。find out找出；发现；work out做出；解决；carry out实施。
答案：D
4．It is reported that the Beijing­Shanghai High­Speed Railway will be completed in about forty five months，about two or three months ________.
A．in the meantime B．in no time
C．against time D．ahead of time
解析：ahead of time意为“提前”，根据句意可知北京到上海的高铁将提前约两三个月完工。in the meantime“在此期间；与此同时”；in no time“立即；马上”；against time“争分夺秒地；尽快地”，三者与句意不符。
答案：D
5．The discovery of gold in Australia led thousands to believe that a fortune ______.
A．is made B．would make
C．was to be made D．had made
解析：句意：澳大利亚金矿的发现使成千上万的人认定会发财。make a fortune“发财”；be to do结构表示注定会发生某事。
答案：C
6．______ a moment and I will go to your rescue.
A．Go on B．Hold on
C．Move on D．Carry on
解析：句意：坚持一会儿，我去救你。hold on “坚持住，挺住”，符合语境。
答案：B
7．After the earthquake，the first thing the local government did was to provide ______ for the homeless families.
A．accommodation B．occupation
C．equipment D．furniture
解析：句意：地震之后，当地政府首先做的事情就是为无家可归的家庭提供住处。accommodation“住处，容身之处”；occupation“职业，工作；占据”；equipment“设备，装备；素质”；furniture家具”。由句意可知，应选accommodation。
答案：A
8．I thought the medicine would make him sleep，but it had the ________ effect.
A．better B．practical
C．opposite D．basic
解析：句意：我原以为这药能使他睡着，但其作用恰恰相反。opposite相反的，相对的，符合句意。
答案：C
9．Jerry was about to sit down and have a cup of tea ________ the doorbell rang.
A．while　　　 B．as　　　
C．when　　　 D．until
解析：句意：杰瑞刚要坐下来喝茶这时门铃响了。be about to do...when...正要做某事这时……
答案：C
10．He ________ that country for political reasons.However，the plane crashed on the way.
A．escaped B．fled
C．ran away D．flee from
解析：考查动词词义辨析。句意：由于政治原因他逃离了那个国家，然而飞机在途中坠毁了。flee既可作及物动词，又可作不及物动词；D项的形式不对；A、C项缺少介词from。
答案：B
11．They urged that the library ________ open during the vacation.
A．must be kept B．is kept
C．would be kept D．be kept
解析：句意：他们极力主张在假期期间应当开放图书馆。the library与keep之间为被动关系，且urge后跟从句时使用虚拟语气，即谓语动词用(should＋)动词原形。故选D。
答案：D
12．She turned and ________ slowly down the block toward her own house.
A．pulled B．dragged
C．pushed D．drew
解析：句意：她转过身，拖着步子，沿着街区慢慢地走回自己的房子。pull指朝任何方向的移动，用力可大可小；drag指与地平线平行或斜着向上移动，常表示在有助力的情形下，拖一种很重的东西费力地行进；push推，推动；draw平稳地持续抽或拉。
答案：B
13．Employees are entitled to a(n) ________ paid leave of fifteen days.
A．annually B．annual
C．anniversary D．relative
解析：句意：职员一年可享受十五天的带薪假期。annual每年的，按年度计算的；annually是annual的副词形式；anniversary周年的；relative相关的。
答案：B
14．The 1930s ________ the suffering of the Chinese from wars.
A．wrote B．witnessed
C．proved D．supplied
解析：句意：20世纪30年代见证了中国人民遭受的战争灾难。witness目击，见证；prove证明；supply供给，供应。结合句意可知选B。
答案：B
15．After trying many times，they had to ________ the hope of saving the seriously­wounded elephant.
A．abandon B．release
C．discourage D．resign
解析：考查词义辨析。abandon放弃(信念、原则、希望等)；release释放，放出；discourage使消极/沮丧；resign辞职，放弃(工作、职位)。句意：试了多次后，他们不得不放弃了挽救这只受伤严重的大象的希望。
答案：A
Ⅳ.完形填空

With their shining，grey bodies，dolphins__1__ to be large fish.__2__，they are really warm­blooded mammals.Although they can stay under the water for__3__ fifteen minutes at a time，the dolphins，__4__ whales，must come to the surface to breathe air through a hole on top of their heads.Dolphins are social animals.Many of them even enjoy being around humans.__5__being playful，they are helpful to men.For example，__6__400 BC，the Greek poet Arion was saved from drowning by a dolphin.From then until now，dolphins have been helping__7__ who are in trouble.Swimmers，however，are not__8__ humans they help.In some parts of the world，they help fishermen__9__fish.
Dolphins，whose brain is even__10__ than a human brain，are very clever.Therefore，some people think a dolphin__11__smarter than a person.But__12__brain size is not the only measure of cleverness.Besides，__13__ dolphins’ cleverness in other ways is not possible__14__ men cannot talk with them.But we can almost__15__ that dolphins can talk with__16__.They make different__17__ which seem to be__18__ a form of language.Up to now men __19__ able to find out how dolphins are talking，so no one really knows__20__ they are thinking.If we could talk with them，perhaps they could teach us to be as happy as they seem to be.
1．A.pretend　　　　　　　　　　B．look
C．happen D．appear
解析：appear侧重指从外表上看似乎如此，不注重实际上是否如此。look指基于视觉印象上的看法，往往指看上去如此，实际上也是如此。
答案：D
2．A.But B．However
C．Then D．Instead
解析：此句承接上文表示转折。but后不加逗号。
答案：B
3．A.less than B．not more than
C．no more than D．up to
解析：up to是固定短语，此处指“多达”十五分钟。
答案：D
4．A.like B．as
C．with D．unlike
解析：like作介词，意为“像……一样”；as作介词，表示“作为”。
答案：A
5．A.Beside B．Besides
C．Except for D．Except
解析：此句意为：“海豚除了爱玩耍，它们对人类也有帮助。”
答案：B
6．A.as far as B．as long as
C．as soon as D．as early as
解析：as early as表示“早在……的时候”。
答案：D
7．A.poets B．drivers
C．sailors D．swimmers
解析：从下句话可知。
答案：D
8．A.only B．the only
C．just only D．the just
解析：句意为“然而，游泳者并不是海豚帮助的唯一的人”。
答案：B
9．A.catching B．catch
C．being caught D．caught
解析：help sb.(to)do sth.表示“帮助某人做某事”。
答案：B
10．A.smaller B．heavier
C．lighter D．larger
解析：由上下文可知。
答案：D
11．A.will be B．must be
C．can’t be D．mustn’t be
解析：must表示肯定推测。
答案：B
12．A.of course B．in the end
C．by nature D．by means of
解析：of course表示“当然”。大脑的大小并不是衡量是否聪明的唯一的标准。
答案：A
13．A.deciding B．knowing
C．measuring D．telling
解析：由“brain size is not the only measure of cleverness”可知答案。
答案：C
14．A.since B．and
C．unless D．but
解析：since表示原因。
答案：A
15．A.sure B．certain
C．be sure D．be certainly
解析：be sure作谓语，表示“确信海豚彼此之间可以交谈”。
答案：C
16．A.people B．fish
C．humans D．each other
解析：each other表示“彼此”。
答案：D
17．A.voice B．noise
C．sounds D．cries
解析：此处指发出声音。voice嗓音；noise噪音；cry哭喊声，叫喊声。
答案：C
18．A.at least B．as
C．nothing like D．possible
解析：发出的声音，看起来至少是一种语言形式。
答案：A
19．A.have been B．haven’t been
C．will be D．won’t be
解析：直到现在，人们还没能弄清楚海豚怎样进行交谈。
答案：B
20．A.why B．where
C．what D．which
解析：what 引导宾语从句，在从句中作宾语。
答案：C
Ⅴ.阅读理解

What do you know about the sea？We know that it looks very pretty when the sun is shining on it.We also know that it can be very rough when there is a strong wind.What other things do we know about it?
The first thing to remember is that the sea is very big.When you look at the map of the world you will find there is more water than land.The sea covers three quarters of the world.
The sea is also very deep in some places.It is not deep everywhere.Some parts of the sea are very shallow.But in some places the depth of the sea is very great.There is one spot，near Japan，where the sea is nearly 11 kilometers deep！The highest mountain in the world is about 9 kilometers high.If that mountain were put into the sea at that place，there would be 2 kilometers of water above it！What a deep place!
If you have swum in the sea，you know that it is salty.You can taste the salty.Rivers，which flow into the sea，carry salt from the land into the sea.Some parts of the sea are more salty than other parts.There is one sea，called the Dead Sea，which is very salty.It is so salty that swimmers cannot sink！Fish cannot live in the Dead Sea!
In most parts of the sea，there are plenty of fishes and plants.Some live near the top of the sea，and others live deep down. There are also millions of tiny living things that float in the sea.These floating things are so small that it is hard to see them.Many fish live by eating these floating things.
The sea can be very cold.Divers，who go deep down in the sea，know this.On the top the water may be warm.When the diver goes downwards，the sea becomes colder and colder.Another thing happens.When the diver goes deeper，the water above presses down on him.It squeezes(压榨)him.Then the diver has to wear clothes made of metal.But he cannot go very deep.Some people who wanted to go very deep used a very strong diving ship！They went down to the deepest part of the sea in it.They went down to a depth of eleven kilometers!
1．When does the sea look beautiful?
A．When it is calm.
B．When the weather is fine.
C．When there is a strong wind.
D．When there is a storm.
解析：事实细节题。从第一段的“We know that it looks very pretty when the sun is shining on it.”看出“The weather is fine.”和“The sun is shining.”是相同的。
答案：B
2．Why does the author cite(引用)the sea somewhere near Japan?
A．To show that the sea in some places is very deep.
B．To show that the sea in some places is very rough.
C．To show that its depth is 9 kilometers greater than the height of the highest mountain.
D．To show that its depth is 11 kilometers greater than the height of the highest mountain.
解析：推理判断题。从第三段的“But in some places the depth of the sea is very great.”“What a deep place！”看出是强调海洋的深度。
答案：A
3．Which of the following statements about the Dead Sea is NOT true?
A．There are plenty of fishes in it.
B．It is a safe place for swimmers.
C．It is extremely salty.
D．No fish can be found in it.
解析：事实细节题。从第四段的“Fish cannot live in the Dead Sea！”看出the Dead Sea里有大量的鱼是错误的。
答案：A
4．Why can’t people go very deep in the sea?
A．Because the deepest part of the sea is very cold.
B．Because the deepest part of the sea is very rough.
C．Because the pressure of water at great depths is unendurable(无法忍受的)．
D．Because the deepest part of sea is very salty.
解析：推理判断题。在最后一段的“When the diver goes deeper，the water above presses down on him.It squeezes(压榨)him.Then the diver has to wear clothes made of metal.”中，press(挤压)和squeeze(压榨)与题干中的pressure of water和unendurable吻合起来。
答案：C