题目内容
―Hurry, John!
―Oh, damn! Both my legs are nearly to give out. I ________ for hours.
A. had walked B. walked
C. have been walking D. am walking
C
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题目内容
―Hurry, John!
―Oh, damn! Both my legs are nearly to give out. I ________ for hours.
A. had walked B. walked
C. have been walking D. am walking