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

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：女士们，先生们，请系好安全带，飞机马上要起飞了take off习惯于用进行时态表将来。所以用B。