I Beijing in a few days. Do you know when the earliest plane ?
A. leaves; takes off
B. is leaving off; is taking off
C. am leaving for; takes off
D. leave; is taking off
网友回答
A. leaves; takes off
B. is leaving off; is taking off
(答案→)C. am leaving for; takes off
D. leave; is taking off
解析：考查时态：句意：几天后我要动身去北京，你知道最早的一班航班是什么时候起飞？第一空用现在进行时表示即将，马上做，第二空用一般现在时，表示“按时刻表即将做”，选C。