题目内容

Mr. Liu __________ for ten minutes.
A．has leftB．will leaveC．has been awayD．left
C

试题分析：句意：刘先生已经走了10分钟了。根据for ten minutes要用现在完成时，而leave是瞬间动词，后面不能接一段时间；has been away离开，表状态，可以接一段时间，故选C。
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