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选择(此题考察情态动词的用法)

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—what do you think that noise was? —It _____a cat A might be B might have been C must be D can be 2._____above ,water is a liquid. A That have been said B what is said C Which has been said D As has been said
解题思路: 首先要牢记情态动词的用法。
解题过程:
1。表示推测的情态动词can, could, may, might, ought to, should及must后接不定式一般式表示对现在的推测,后接不定式完成式表示对过去的推测(除ought to, should)。从上面的was可以看出,应该是对过去的推测,所以此题选B。
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最终答案:略