题目内容

—Tom can’t find his gloves. Are these blue gloves his?
      —No, they ______ be his. His gloves are black.
A．mustB．mayC．can’t D．mustn't
C

试题分析：句意：汤姆找不到他的手套。这些蓝色的手套是他的吗？不，不可能是他的。他的手套是黑的。在英语中，表示肯定的推测常用must，表示否定的推测常用can。根据no可知是否定推测，所以选C。
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