"The seller would sell the skirt for 50 dollars,but the cust

"The seller would sell the skirt for 50 dollars,but the customer ________ only h"
"The seller would sell the skirt for 50 dollars,but the customer ________ only half the price,and finally they agreed ________ the price．
A.supplied; on
B.charged; on
C.offered; with
D.offered; on"