题目

英语高手请进,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
D.was sure to strike
可书上两句型都有：be sure /certain of sth
be sure /certain to do sth
还有书上说be sure 的主语只能是人,
但有人又细说be sure of的主语只能是人.be sure to do主语可是物也可是人,这说法对吗?
希望大家根据我问的回答啊 不要粘其他的过来 百度的解释我都看遍了还不明白才问的 感激不尽

提问时间：2020-07-17

答案

那你就抛开你在百度看的,只去了解我给出的解释就好了.
disaster is sure to strike if the mirror was broken.
你可以从这个句子看出,disaster是做主语,并且是主动句的.
过去很少人相信镜子破了,灾难就会降临.