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。