问题
选择题
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
答案：A
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：