After I had walked for six hours ________.
After I had walked for six hours ________.
A.I had been tired out
B.I'll be tired out
C.I was tired out
D.I would have been tired out
答案及解析： C
After I had walked for six hours ________.
A.I had been tired out
B.I'll be tired out
C.I was tired out
D.I would have been tired out
答案及解析： C