Ladies and gentlemen,please fasten your seat belts,the plane .
A. takes off
B. is taking off
C. is going to take off
D. is to take off
网友回答
A. takes off
(答案→)B. is taking off
C. is going to take off
D. is to take off
解析：本题考查时态。题干所表示的是航班乘务员在通知乘客系好安全带，其原因是“飞机马上要起飞了”，“take off”要用进行时表示将来时。答案选B。A项也可用现在时表示将来时态，但必须接有时刻类的时间状语，传达的是车、船、飞机将按所安排好的时刻起程。