We regret our inability to agree （） your proposal to pack the goods （） cardboard boxes, because transshipment has to B.made at Hong Kong for the goods to B.shipped to our port.

We regret our inability to agree （） your proposal to pack the goods （） cardboard boxes, because transshipment has to B.made at Hong Kong for the goods to B.shipped to our port.
A.on, in
B.to, in
C.with, in
D.to, by
正确答案：B