题目内容
My friend’s flight had taken off _________ I got to the airport to see him off.
A.while | B.after | C.before | D.until |
C
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.
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