quite a few people used to believe that disaster was sure______if a mirror was broken.a\of strikingb\of having struckc\to be struckd\to strike为什么选4d?

问题描述:

quite a few people used to believe that disaster was sure______if a mirror was broken.
a\of striking
b\of having struck
c\to be struck
d\to strike
为什么选4d?

不少人相信镜子破掉会有灾难不幸降临,就是这个意思
A的话应该是somebody be sure of sth
BC一样
D to做不定式