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Did you enjoy yourselves _________ Christmas?
[
A
B
C
D
The 31st Olympic Games will take place in Brazil ______ 2016.
A.at B.on C.in D.by
Lily had left ______ the time we arrived.
A.at
B.on
C.by
D.in
I like going to school_____bike.
A.in B.on C.by D.at
It’s hot ____________summer in Beijing.
A.by
C.at