单选题 —"She must be in the dormitory now."
—"No, she ______ be there. I saw her in the classroom a minute ago."
  • [A] mustn't
  • [B] can't
  • [C] couldn't
  • [D] wouldn't


【正确答案】 B
【答案解析】[名师精解] can't是情态动词推测性用法,表示说话人的主观看法,意为“不可能”。
[解题秘籍] can的否定形式常用来表达否定性的猜测,如:He can't be here. He went to Hangzhou yesterday.他不可能在这儿,他昨天就去了杭州。