根据句意用can,could,must can't填空
用could,need,can't,may,must填空
用could,can,can't,must,mustn't need't may填空
(有2题)一、根据要求答题 二、用could、can、may、must、needn't填空
must,might,could,can't的区别
must ,might ,could ,can't的用法?
根据语境,用can,may,might,can't,must,mustn't等情态动词填空
根据句意,选用can,can't,must .have to has to或has to 填空.
用can,must,can't,mustn't填空
用can/can't;must/mustn't填空
用must,mustn't,can,can't填空
几个选词填空,must 、can、mustn't、can't
选词填空 can can't must needn't