( )-Must I do my homework at once?A.needn't B.mustn't C.can't( )-Must I do my homework at once?A.needn't B.mustn't C.can't D.may not

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( )-Must I do my homework at once?A.needn't B.mustn't C.can't
( )-Must I do my homework at once?
A.needn't B.mustn't C.can't D.may not

a