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    精英家教网 > 高中英语 > 题目详情
    My parents have promised to come to see me before I _______  for Africa. 
    A．have leftB．leaveC．leftD．will leave
    B
    考查动词时态。由前句的现在完成时可以看出leave还没有发生，选B符合语境。
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