问题

Hurry up. Our plane _______ at 7:00 pm according to the timetable. It will be just an hour left before it _______.
A:will leave, takes off
B:leaves, takes off
C:is leaving, is taking off
D:will leave, will take off ;
B:leaves, takes off
C:is leaving, is taking off
D:will leave, will take off ;
正确答案是: