题目内容

—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’tB．mustn’t; mustn’tC．can’t; can’tD．must; can’t
D
考查情态动词表推测。must表推测用于肯定句当中，can表推测用于疑问或否定句中。所以答案选D。
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