When his mother came in Charlie pretended . A. sleepB. sleepingC. to sleepingD. to be sle

问题补充：

When his mother came in, Charlie pretended .

A. sleep

B. sleeping

C. to sleeping

D. to be sleeping

答案：

A. sleep

B. sleeping

C. to sleeping

(答案→)D. to be sleeping

解析：这题考查pretend的搭配问题，pretend后面接不定式的各种形式，pretend to do“假装要做”，pretend to be doing“假装真正做”，pretend to have done“假装已经做了”，句意是：当妈妈回来，查理假装正在睡觉。选D。