问题
选择题
My parents have promised to come to see me before I _______ for Africa.
A．have left
B．leave
C．left
D．will leave
答案
答案：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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My parents have promised to come to see me before I _______ for Africa.
A．have left
B．leave
C．left
D．will leave
答案：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。