If _______ in class, you will have to clean the classroom for a week as a punishment.
A．caught sleepingB．caught to sleepC．catching sleepingD．to catch to sleep
A
這題考查if的省略句，詞組是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：如果你被抓住在課堂睡覺，你就打掃教室一個星期做為懲罰。選A。
句意是：
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