题目内容
8.They are smiling.There ______ much trouble solving the problem.( )A. | couldn't be | B. | mustn't be | ||
C. | can't have been | D. | mustn't have been |
分析 他们在微笑着,在解决这个问题方面不可能有太多的麻烦.
解答 答案:C
根据句子的语境"他们在微笑着"可推测,问题解决的应该很顺利,此处应表示对过去情况比较肯定的推测,因此应选can't+have+done的形式,表示确定"不可能有";must用于否定句中时,表示"禁止,不准";故选C
点评 本题考查了表推测的情态动词在there be结构中的用法.做此类题时,首先应根据句子提供的语境推测出空白处所表达的意思,然后结合情态动词表推测的用法,从而选出正确的答案.
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