We regret that you ask to allow you a commission ______ 5%______ each set.
A.of, on
B.to, in
C.on, in
D./, on
正确答案是A
We regret that you ask to allow you a commission ______ 5%______ each set.
A.of, on
B.to, in
C.on, in
D./, on
正确答案是A