问题
选择题
Mr. Black _____ for Shanghai in a few days. Do you know when the earliest plane ____on Sunday?
A．leaves; takes off
B．is leaving; takes off
C．is leaving; is taking off
D．leaves; is taking off
答案
答案：B
题目分析：第一空用进行时表将来时；第二空表达有固定时间表的航班、列车等的活动时，用一般现在时。句意：布莱克先生几天后要离开到上海去。你知道星期天最早的航班吗？