He pretended a book when his mother entered the room.
A. to read
B. to have read
C. reading
D. to be reading
网友回答
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。