题目内容
12.-I have been to the moon twice.-You be joking!It's impossible!( )
| A. | can | B. | may | C. | must | D. | need |
分析 --我去过月球两次.
--你一定在开玩笑.那是不可能的.
解答 答案:C.我们可用"逻辑推理法"解答本题.根据I have been to the moon twice和It's impossible可知,此处表示肯定推测,意为"你一定在开玩笑".can表示惊异、怀疑或不相信的推测,多用于否定句或疑问句中,常用来表示对现在或将来事实的推测;may意为"可能;也许",常用于肯定句中,表示把握性不大的推测;must意为"一定是;肯定是",表示有把握的推测,只用于肯定句中,表示对现在的推测;need常用于否定句,意为"不一定".故选C.
点评 本题考查了情态动词的用法.解答时注意理解句意以及所给选项的意思并作出正确选择.
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