Question

【题目】It suddenly occurred to him ____ he had left his keys in the office.
A.that
B.what
C.where
D.which

Answer 1

【答案】A
【解析】考查主语从句，句意：他突然想起把钥匙忘在办公室。It occurred tosb that 。。某人突然间想起，故选A项。