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

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

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Tosurviveintheintensetradecompetitionbetweencountries,wemust______thequalitiesandvarietiesofproductswemaketo

(86)Eachday,50,000shiny,fire-engine-redGalaapplesworkthewaythroughasprawlingfactoryinSwedesboro,N.J.(87)Ins

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Whenevertwoormoreunusualtraitsorsituationsarefoundinthesameplace,itistemptingtolookformorethanacoincident

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Inthepastfewyears,thelittleland-boundcountryhadbeen______mercilesslybyfinancialcrises.

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