题目内容
Mr. Li has warned us ____ in class many times.
- A.to talk
- B.not to talk
- C.talking
- D.not talking
B
warn sb. not to do sth.提醒某人不要做……,动词不定式作宾语补足语。
warn sb. not to do sth.提醒某人不要做……,动词不定式作宾语补足语。
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