---Hurry, John!---Oh, damn! Both my legs are nearly to give out. I ____for hours.A．had walked B．walk

题目简介

---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

题型：单选题难度：中档来源：不详

考察时态。根据for hours和my legs are nearly to give out可知我已经连续步行好几个小时了，故使用现在完成进行时，故C正确。句意“我的双腿几乎走不动了，我已经连续步行好几个小时了。