Question

【题目】He pretended when his mother stepped into his room.

A. to study B. studying

C. to be studying D. to have studied

Answer 1

【答案】C

【解析】

考查不定式用法。不定式的一般式to do说明该动作在谓语动词之后发生；进行时to be doing表示两者同时发生；to be done表示被动。句意：当他的妈妈走进房间的时候，他假装在睡觉。根据句意说明两个动作同时发生，故使用不定式的进行时。故C正确。