题目内容
【题目】—Another cup of coffee?
—No, thanks. I _____ be off. Mary is waiting for me.
A．can B．may
C．must D．might
【答案】C
【解析】
试题分析：结合关键信息“Mary is waiting for me.”可知题意为“我必须离开了”，故排除A、B、D三项，故选C
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题目内容
【题目】—Another cup of coffee?
—No, thanks. I _____ be off. Mary is waiting for me.
A．can B．may
C．must D．might
【答案】C
【解析】
试题分析：结合关键信息“Mary is waiting for me.”可知题意为“我必须离开了”，故排除A、B、D三项，故选C