we can't arrive late for class.we must ( )(are)on time.用所给词的适当形式填空
问题描述:
we can't arrive late for class.we must ( )(are)on time.用所给词的适当形式填空
答
be.原因:must 后面填动词原形.
we can't arrive late for class.we must ( )(are)on time.用所给词的适当形式填空
be.原因:must 后面填动词原形.