.--- Write it __________ your book, please.---S-U-M-M-E-R, summer.
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on 
B
in 
C
after
D
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推荐题目
Who is it _______? 
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for
B
by
C
of
D
use
 The boy is ________ the room.
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on
B
in
C
at
D
under
What’s the matter ________ you?
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with
B
of
C
in
D
at