题目内容
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Hey, boy!We should keep the park clean.You ________ throw litter about.-
Sorry, I won't do that again.[ ]
A.mustn't
B.needn't
C.couldn't
答案:A
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题目内容
-
Hey, boy!We should keep the park clean.You ________ throw litter about.-
Sorry, I won't do that again.A.mustn't
B.needn't
C.couldn't