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—Excuse me, Maria. Can I use your bike?—Sure. Here you are. But you must return it _____ time.
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in
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Winter holidays will begin _____ January 17.
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in
B
at
C
on
D
for
--How will students study in the future?--- ____home______  computers.
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In；in
B
At；in
C
At；with
D
At：on
Can I borrow some books _______you?
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to
B
from
C
For
D
of
--- How do you study English?---I study English        talking with foreign students
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by
B
in
C
at
D
on
 Lily often helps her sister ____her homework.
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for
B
at
C
of
D
with