It suddenly occurred to me I hadn’t locked my doorA. whichB. whereC. that D. whether

问题补充：

It suddenly occurred to me I hadn’t locked my door．

A. which

B. where

C. that

D. whether

答案：

A. which

B. where

(答案→)C. that

D. whether

解析：

试题分析:句意：我突然想到我没有锁门。固定句型：It occurred to sb that从句，“某人突然想起某事”，it是形式主语，that从句是真正的主语，答案选C。