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
网友回答
D解析本题考查sure构成的固定短语的用法。be sure of强调主语相信能做某事；be sure to强调的是说话人相信主语会或有能力做某事。本句的意思是“很多人曾经相信如果一面镜子碎了，灾难必定会发生”。be sure的主语是disaster，是说话人相信主语会做某事，不能选择A和B两项；没有被动关系，不能选C项。