18． My mother for Beijing in a few days. I wonder when the earliest plane on Monday?
A. leaves; takes off
B. is leaving; takes off
C. is leaving; is taking off
D. leaves; is taking off
网友回答
A. leaves; takes off
(答案→)B. is leaving; takes off
C. is leaving; is taking off
D. leaves; is taking off
解析：可联系答.案.网客服索取。