问题补充：
My father Japan in a few days. Do you know when the earliest plane ?
A. leaves; takes off
B. is leaving; is going to take off
C. is leaving; takes off
D. leaves; is taking off
答案：
A. leaves; takes off
(答案→)B. is leaving; is going to take off
C. is leaving; takes off
D. leaves; is taking off
解析：句意：我爸爸几天后将去日本，你知道最早的飞机是什么时候吗？这两个空都是将来的动作，第一空用现在进行时表示即将发生，适用于go ，come，leave，arrive等动词，第二空是按时刻表即将发生的事情，用一般现在时表示一般将来时，所以选B。
