Ladies and gentlemen please fasten your seat belts. The plane . A. takes offB. is taking

问题补充：

Ladies and gentlemen, please fasten your seat belts. The plane .

A. takes off

B. is taking off

C. has taken off

D. took off

答案：

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”。