My friend’s flight had taken off I got to the airport to see him off.A．whileB．afterC．beforeD．until 题目和参考答案——青夏教育精英家教网—

My friend’s flight had taken off _________ I got to the airport to see him off.

A．while

B．after

C．before

D．until

解析试题分析: 句意：在我到达机场送朋友前，他的航班已经起飞了。while当……的时候， after在……之后， before在……之前，until直到……。take off起飞，see off送行。got to一般过去时，had taken off过去完成时，可知主语动作发生在从句之前，故选C.
考点：考查连词。

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