---Hurry, John!---Oh, damn! Both my legs are nearly to give out. I ____for hours.
#101892
A
had walked
B
walked
C
have been walking
D
am walking
推荐题目
He said to us that he ____the teacher’s instructions.
#100425
A
must follow
B
followed
C
follow
D
must have followed
I fixed my eyes upon the newcomer, wondering whether I ________ him somewhere before.
#99984
A
saw   
B
has seen   
C
had seen   
D
would see