---Hurry, John! ---Oh, damn! Both my legs are nearly to give out. I for hours. A
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---Hurry, John!
---Oh, damn! Both my legs are nearly togive out. I ____for hours.
| A．had walked | B．walked | C．have been walking | D．am walking |
试题答案
【答案】
C
【解析】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。