We have a big library ______ lots of useful books. 
#50302
A
in
B
at
C
with
D
on
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---Where is your father? ---He          to Shanghai    business.
#50469
A
has been ;on
B
has gone; for
C
has been;for
D
has gone;on
The boy ______ blue trousers _______.
#49501
A
with, look cool
B
in, looks cool
C
with, looks cool
D
in, look cool