— What Ihave pay attention while( —You mustn't point ( )anyone with your chopsticks.A.eat;at B.eaten; to C.eating; at 请问选哪个,为什么?

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— What Ihave pay attention while( —You mustn't point ( )anyone with your chopsticks.
A.eat;at B.eaten; to C.eating; at 请问选哪个,为什么?

c,while后边不是一个完整的句子,接动名词