摘要: Quite a few people used to believe that disaster if a mirror was broken. A. was sure of striking B. was sure of having struck C. was sure to be struck D. was sure to strike [解析] be sure of“对--确信.有把握 .主语必须是人.be sure to do sth“就要.一定会 .主语可以是人或物.动词不定式表示将要发生的事.意思是“就要-- .译文:过去很多人都认为如果镜子破了.一定会引起灾难.注意:be+形容词后接不定式的一般式.不用被动式.如:The problem is difficult for us to work out.我们很难做出这个问题.答案为D.

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