—Come on，Kitty.
—Oh, good heavens! Both my legs are nearly to give out. I for hours like a dog.
A. have been walking
B. had walked
C. was walking
D. walked
网友回答
(答案→)A. have been walking
B. had walked
C. was walking
D. walked
解析：本题考查动词时态。根据句中的my legs are nearly to give out可知本题应该使用现在完成进行时，表示答话人一直走了几个小时的路，因此腿上没有一点儿力气了。