题目内容
We can’t fix this machine well. Can you show us ___?
A. how to do B. what to do it C. how to do it D. where to do
C
【解析】
试题分析：句意：我们不能修理好这台机器，你能给我们展示一下如何去修理它吗？what to do 做什么；how to do sth 如何做某事；where to do sth 到哪里去做某事。根据句意，故选C。
考点：考查疑问词+动词不定式的用法。
The world is not hungry，but it’s thirsty. 1 while we say we are short of water.Why？Because about 97% of water on the earth is sea water which we can‘t drink or use for watering plants directly.Man can only drink and use the 3% of water that comes from rivers and lakes. 2 ，because some of it has been polluted.
Now more water is needed.The problem is how we can avoid a serious water shortage in the future. 3 Scientists are making study in this field.Today，In most large cities water is used only once and then runs to the sea or rivers.but it can be used again.Even if every large city reused its water，the water will still not be enough. 4 .
The sea seems to give us the best answer.There is a lot of water in the sea.All that needs to be get the salt out of the sea water.This will be expensive，but it has already been used in many parts of the world. 6 So you see，if we can find out a way，we’ll be in no danger of drying up.
从方框中所给的选项中选出能填入空白处的最佳选项，补全短文。其中有一项为多余选项。
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A．Scientists are trying to find a cheaper way of doing it. |
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B．It seems strange that nearly 3/4 of the earth is covered with water. |
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C．What could people do next? |
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D．We should use all the water directly. |
E. First, we should find out ways to reuse it.
F. And we can’t even use all of that.