题目内容

My parents have promised to come to see me before I ____for Africa.
A．have leftB．leaveC．leftD．will leave
A
考查时态.句意:我的父母许诺在我动身去非洲前来看我.可知从句描述的是在某个时间点前完成的动作,故用完成时态,选A.
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