问题补充:
He pretended a book when his mother entered the room.
A. to read
B. to have read
C. reading
D. to be reading
答案:
A. to read
B. to have read
C. reading
(答案→)D. to be reading
解析:pretend 后接不定式,先排除C,ABD均为不定式,A一般式,表示发生在谓语动词动作之后,B完成式表示发生在谓语动词动作之前,D表示与谓语动词动作同时发生。根据状语when his mother entered the room可知,不定式的动作和谓语动词动作同时发生,故选D。句意,当他妈妈进入房间时,他正假装看书。
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