Without gravity, we _____ walk on the ground as freely as we do now. A．couldn’t
题型：不详难度：来源：
Without gravity, we _____ walk on the ground as freely as we do now. | A．couldn’t | B．mustn’t | C．shan’t | D．needn’t |
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答案
| A |
解析
试题分析：考查情态动词：A. couldn’t 不能B. mustn’t 禁止C. shan’t 不该D. needn’t不必，句意：没有重力我们就不能象现在这样自由地在地面上行走。选A。
点评：这题主要是情态动词的用法，情态动词主要从词义和语气判断，所以在具体的语境中要注意选用恰当的词语。这里考查的是情态动词的否定的用法：注意肯定和否定含义的差别，如：must是必须，mustn’t是禁止。 |
举一反三
That man in the corner of the restaurant ______ be Mr. Lee, for he went to Australia yesterday.| A．can’t | B．need | C．must | D．won’t |
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—Where did you get this book?
—I picked it up from a second-hand bookshop if you ______ know. |
Being examined twice a year, whether it is a car or a bus or a truck, it is the rule that every driver____ obey in this city.| A．shall | B．can | C．has to | D．need |
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Michael be a policeman, for he is much too short．| A．needn’t | B．can’t | C．should | D．may |
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The weather turned out to be fine yesterday．I the trouble to carry my umbrella with me．| A．should have taken | B．could have taken | | C．needn’t have taken | D．mustn’t have taken |
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