They can buy the pens _____ a very good _____.
#51047
A
at, price
B
in, price
C
at, cost
D
at, selling
推荐题目
Who is it _______? 
#48374
A
for
B
by
C
of
D
use
 The boy is ________ the room.
#48361
A
on
B
in
C
at
D
under
What’s the matter ________ you?
#46395
A
with
B
of
C
in
D
at