If in class, you will have to clean the classroom for a week as a punishment. A. caught s

If in class, you will have to clean the classroom for a week as a punishment.
A. caught sleeping
B. caught to sleep
C. catching sleeping
D. to catch to sleep

(答案→)A. caught sleepingB. caught to sleepC. catching sleepingD. to catch to sleep解析：这题考查if的省略句，词组是catch sb doing“抓住某人做”，if后面省略了you are，完整的句子是：if you are caught sleeping in class.句意是：如果你被抓住在课堂睡觉，你就打扫教室一个星期做为惩罚。选A。句意是：

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