Question

When his mother came home, he pretended       sound.

A．sleeping

B．to sleep

C．to have slept

D．to be sleeping

Answer 1

D

考查短语：假装正在做某事pretend to be doing sth，句意：当他的母亲到家的时候，他在假装熟睡。to sleep动作还没发生，to have slept动作发生在谓语动词之前，故选D。