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—Mr. Wang __________ be in the office. The light is still on.

—No, he __________ be. Because he phoned me from the farm just now.

A. may; mustn’t   B. mustn’t; mustn’t C. can’t; can’t     D. must; can’t

九年级英语单项填空中等难度题

少年,再来一题如何?
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