题目内容

Echo       for half a month. She’ll come back in two months.
A．leftB．leavesC．has leftD．has been away
D
因为本句的时间状语，为for +一段时间，此时要求动词为延续性动词，只有D，表示已经离开了！故选，且相当于延续性动词，故选答案为D
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