题目内容

Ladies and gentlemen, please fasten your seat belts. The plane         . 
A．takes offB．is taking offC．has taken offD．took off
B
考察时态。现在进行时表示即将要发生的事情，A项现在时指按照安排要发生的事情。结合句意可知B正确。句意：女士们先生们，请系好安全带，飞机马上就要起飞了。
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