I know Mr. Brown；we ＿＿ to each other at an international conference.
#104419
A
are introduced
B
have been introduced
C
were introduced
D
had been introduced
推荐题目
I have to walk to school today because my bike _____now.
#101260
A
is being repaired
B
has been repaired
C
is repaired
D
has repaired
—You seem tired, David.—Yes. I _____ all day long and can’t wait to go to bed now.
#102886
A
am working
B
had been working
C
have been working
D
was working
--- I started off to walk, but Peter gave me a lift. --- Therefore, you _____ after all.
#103308
A
didn’t need walk
B
needed not walk
C
didn’t need to walk
D
need not to walk
—Have you been to the United States?—Yes, only once. I ________ there only for seven days.
#102373
A
stayed
B
had stayed
C
have stayed
D
was staying
-----Do you regret having quit your job?----Why should I? I ________ as much ,but I really enjoy the present one.
#101441
A
didn’t earn
B
don’t earn
C
hadn’t earned
D
haven’t earned