We enjoyed the wonderful firework display ______ the night of National Day. 
#46702
A
in
B
on
C
for
D
at
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The boy ______ blue trousers _______.
#49501
A
with, look cool
B
in, looks cool
C
with, looks cool
D
in, look cool
________ the party, we sang a song together.
#48049
A
In the end
B
At the end
C
In the end of
D
At the end of