题目内容
-Come on, Kitty.
-Oh, good heavens! Both my legs are nearly to give out.I ________ for hours like a dog.
[ ]
A.had walked
B.have walked
C.am walking
D.have been walking
答案:D
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题目内容
-Come on, Kitty.
-Oh, good heavens! Both my legs are nearly to give out.I ________ for hours like a dog.
A.had walked
B.have walked
C.am walking
D.have been walking