Ladies and gentlemen, please fasten your seat belts. The plane .
A. takes off
B. is taking off
C. has taken off
D. took off
网友回答
A. takes off
(答案→)B. is taking off
C. has taken off
D. took off
解析：
此题答案选B，用现在进行时表示将来意义。The plane is taking off. 的意思是“飞机马上就要起飞了”。