--Have you ever been here before? ---Well, I once _________ here for four years. Those days are really unforgettable. 
#103634
A
have stayed
B
had stayed
C
have been staying
D
stayed
推荐题目
The scientist __________ the experiment for half a year, but he _______ yet.
#102041
A
made; didn’t succeed
B
made; hasn’t succeeded
C
was making; didn’t succeed
D
has been making; hasn’t succeeded
---It’s many years since I saw you last time. I _________ you at all. ---I wouldn’t have, either, if someone _________ you by the name.
#102049
A
don’t recognize; hadn’t called
B
didn’t recognize; didn’t call
C
haven’t recognized; didn’t call
D
didn’t recognize; hadn’t called
My dictionary____. I have looked for it everywhere but still____ it.
#102562
A
has lost; don’t find
B
is missing; don’t find
C
has lost; haven’t found
D
is missing, haven’t found