--- He looks so tired. What’s wrong?
--- Nothing serious. He just stayed up last night, ___________his papers.


  1. A.
    to prepare
  2. B.
    having prepared
  3. C.
    prepared
  4. D.
    preparing
D
試題分析：整個句子已經(jīng)有謂語動詞，所以該空應(yīng)該用非謂語動詞，又因為He與prepare之間是主動關(guān)系或伴隨狀語，故排除C；選項A表目的或?qū)�，但是前面不用加逗號，故排除A；選項B表示它的動作發(fā)生在謂語動詞之前，顯然是錯誤的，故排除A，所以選D
考點：考查非謂語動詞的用法
點評：非謂語動詞是高考熱點也是考生比較難以理解的語法項目，故考生需要做一些這方面的試題來加以鞏固。
即學(xué)即練：_________attentively，he forgot the time for lunch．
A. to Read      B. having read          C. Read     D. Reading
解析：D Reading attentively與he之間是主動關(guān)系，Reading attentively作原因狀語。句意：由于在專心讀書，他忘了吃午飯的時間。
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One of the world's richest men has taken a close interest in one of man’s most basic functions: visiting the toilet．Bill Gates’s charitable organization, the Bill and Melinda Gates Foundation, is looking for inventors to design the loo of the future, which, they hope, would improve sanitation for millions of people around the world．
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But clearly Bill Gates doesn’t feel he’s flushing money down the toilet．After the Seattle event he said, “We, couldn’t be happier with the response we’ve gotten,” Gates has even pledged $370m more to the future toilet project．They hope to field test more prototypes over the next three years．
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A．Because he wants to test people’s sense of creativity．
B．Because he wants to improve sanitation for many people．
C．Because he thinks the traditional ones are out of fashion．
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B．They might cause diseases．
C．They are not always practical．
D．They are too complicated to use.
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A．LooB．sanitationC．diarrheaD．prototype
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B．can turn human waste into charcoal
C．can produce power with solar energy
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But the winner was a solar-powered design which generated hydrogen gas and electricity．The team from the California Institute of Technology（CIT）picked up a prize of $ 100,000.

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A．Because he wants to test people's sense of creativity．

B．Because he thinks the traditional ones are out of fashion

C．Because he wants to improve sanitation for many people．

D．Because he can't design this kind of things himself．

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A．can change human waste into electricity

B．can turn human waste into charcoal

C．can use urine for flushing

D．can produce power with solar energy

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The challenge set by Bill Gates was to come up with a latrine which works without running water, electricity or aseptic tank(化糞池)．It also needed to operate for less than 5 cents．28 designs were displayed at the recent Reinvent the Toilet Fair in Seattle, USA．Among them was one which turned human waste into electricity using microwaves, another which converted human waste into charcoal, and yet another which used urine for flushing．

But the winner was a solar-powered design which generated hydrogen gas and electricity.The team from the California Institute of Technology（CIT）picked up a prize of $ 100,000.

But clearly Bill Gates doesn’t feel he’s flushing money down the toilet．After the Seattle event he said, “We, couldn’t be happier with the response we’ve gotten,” Gates has even pledged $370m more to the future toilet project．They hope to field test more prototypes over the next three years．

1.Why is Bill Gates paying people to invent new toilets?

A．Because he wants to test people’s sense of creativity．

B．Because he wants to improve sanitation for many people．

C．Because he thinks the traditional ones are out of fashion．

D．Because he can’t design this kind of things himself．

2.Which of the following is NOT a problem with the traditional flush toilet?

A．They waste too much water．

B．They might cause diseases．

C．They are not always practical．

D．They are too complicated to use.

3.The underlined word “l(fā)atrine” in the third paragraph might have similar meanings to the word “__ ”n the text．

A．Loo              B．sanitation          C．diarrhea          D．prototype

4.The team from CIT won the prize because their design        .

A．can change human waste into electricity

B．can turn human waste into charcoal

C．can produce power with solar energy

D．can use urine for flushing

5.If someone “flush money down the toilet”, they are       .

A．showing off their wealth

B．being angry with their work onditions

C．wasting money for nothing

D．expressing their great determination

 

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