Question

【题目】—Look！The man at the gate ____ be our teacher. He is always standing there

every morning.

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

A. must；can't B. must；mustn't

C. can't；can't D. can；can't

Answer 1

【答案】A

【解析】

试题分析：句意：——看，在门口的那个人一定是我们的老师，他总是每天早上站在那。——不，一定不是他。他现在正在办公室里开会。Must有把握的肯定推测，can't表示有把握的否定推测。第一个空是有把握的肯定推测，第二个空是有把握的否定推测。mustn't不表示推测，表示禁止。结合语境，故选A。