I was so interested in the video that I______ it for two hours before I realized it.(2 分)A.watchedB.had watchedC.was watchingD.shall have watched

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I was so interested in the video that I______ it for two hours before I realized it.(2 分)A.watchedB.had watchedC.was watchingD.shall have watched
I was so interested in the video that I______ it for two hours before I realized it.(2 分)
A.watched
B.had watched
C.was watching
D.shall have watched

I was so interested in the video that I______ it for two hours before I realized it.(2 分)A.watchedB.had watchedC.was watchingD.shall have watched
B
动作发生了一个时间段的时候一般是用完成时态
have done sth + for(since等)+时间
表示在这个时间段里完成了某个事情
如:I have been in USA since 1996.
由于这里整个时态是过去时,所以后面也要用过去完成时

B

B