——My watch is missing.——You _____it on the desk in your room.A.must forget B.must have forgotten C.must have left D.must leave 为什么选C

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——My watch is missing.——You _____it on the desk in your room.A.must forget B.must have forgotten C.must have left D.must leave 为什么选C

C
语言点:
must have + 过去分词 用以对已经发生的事作以肯定推测
leave sth + 表地点的副词(介词短语)“把.落在什么地方”,forget 不能用于这个结构

C. must have left