He________Beijing，so he knows a lot about it.
#99171
A
has gone to
B
has been to
C
went to
D
goes to
推荐题目
—Have you forgotten anything，sir? —Oh，I forgot to pay.You see，I'm terribly sick，but I ______ to.
#104345
A
didn't mean
B
don't mean
C
haven't meant
D
wasn't meaning
The government has taken some measures to prevent more trees from _____.
#100712
A
cutting down
B
cut down.
C
being cut down
D
been cut down
The harder you ________， the better progress you ________.
#101145
A
will work; will make
B
work; have made
C
work; will make
D
will work; make
----Where ____ the dictionary? I can't see it anywhere.----I ____ it right here. But now it's missing.
#104388
A
did you put; have put
B
have you put; put
C
had you put; was putting
D
were you putting; have put
. Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.
#104797
A
begin
B
began
C
have begun
D
had begun