Question

【题目】— Look! The man at the gate ________ be our headmaster．He is always standing there in the morning．

— No, it ________ be him．He is holding a meeting in the office now．

A. must; can't

B. must; mustn't

C. can't; can't

D. can't; mustn't

Answer 1

【答案】A

【解析】句意：——看！门口的那个人一定是我们的校长，他总是在早上站在那儿。——不，不可能是他。他现在正在办公室开会。考查情态动词辨析题。must一定，表肯定判断；mustn't，一定不要，表禁止；can't不可能，表否定判断。根据句意语境，可知选A。