My friend’s flight had taken off _________ I got to the airport to see him off.A
题型：不详难度：来源：
My friend’s flight had taken off _________ I got to the airport to see him off.| A．while | B．after | C．before | D．until |
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答案
| C |
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. |
举一反三
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