问题描述：
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
为什么选D,请详解,
A.was sure of striking B.was sure of having struck
C.was sure to be struck D.was sure to strike
为什么选D,请详解,
问题解答：
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