We _____ in this pool when we were young, but now it _____ fish. 
#59147
A
are used to swim; used to keep
B
are used to swimming; used to keep
C
used to swimming; is used to keep
D
used to swim; is used for keeping
推荐题目
 China has developed rapidly since 1978.
#63053
A
has a rapid development
B
has made rapid progress
C
has a great change
D
has made a rapid progress
I can’t afford ______ the white car, it’s too expensive.
#61613
A
to buy
B
buying
C
in buy
D
in buying
It’s a bad habit to ______ what you can do today until tomorrow.
#52143
A
write down
B
talk about
C
worry about
D
put off
 ---How long have you _________China?---About two years.
#52391
A
come to
B
been to
C
been in
D
gone to