题目内容
2.-I have been to Mars several times.-You ______ be joking.It's impossible.( )
| A. | can | B. | may | C. | must |
分析 -我已经去过火星好几次了.
-你一定在开玩笑,这是不可能的.
解答 答案:C
根据题意"It's impossible这是不可能的",可知此句是表示猜测,并且是语气比较肯定的猜测,结合选项,A.can 可以 B.可能 C.一定,故选C.
点评 熟悉情态动词的基本用法,结合选项,给出答案.
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