2. 外语
  3. This is the longest flight I have ever taken. By the time we get to Los Angeles, we had flown for 9 hours.

This is the longest flight I have ever taken. By the time we get to Los Angeles, we had flown for 9 hours.

admin2012-01-27  74
问题 This is the longest flight I have ever taken. By the time we get to Los Angeles, we had flown for 9 hours.
选项 A、longest
B、have ever taken
C、had flown
D、for
答案C应改为will have flown。
解析 By the time“到……时”，主语应使用将来完成时。
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