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—Can you help kids ____________ swimming? —Yes, I can.
#46046
A
with
B
by
C
for
D
of
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Hangzhou is famous _______ producing silk in China.
#50235
A
from
B
at
C
in
D
for
Mr. Wang is ______ his wife in social standing(地位), because his wife has made more contributions to our society than he has.
#46349
A
above
B
below
C
over
D
under
 What are you doing       vacation?
#47971
A
in
B
on
C
at
D
for
—How are you going to the supermarket?—We are going there      bike.
#49384
A
on
B
at
C
in
D
by
My little cat sleeps _______ the day , but ______night he begins to work.
#49205
A
at , at
B
on, in
C
on, at
D
during, at