He _writing the paper now.He hadn't written a single word when i left him ten minutes ago. A.shouldn't be B.can't have finished C.can't be D.mustn't have finished 我选的是A 答案为什么是b
人气：464 ℃ 时间：2020-04-14 04:26:40
解答
can't have finished 1.虚拟语气表猜测,否定式can't 【而不用shouldn't】 2.have finished 现在完成时表完成. 这句要表达的意思是,他现在一定还没有完成作业,十分钟前,当我离开他的时候,他还没有动笔.
