31. We think the seller’s ______ is reasonable, and decide to buy 2000 pieces of the product at a time.
(A) debt
(B) receipt
(C) quote
(D) fund
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統計: A(29), B(44), C(145), D(38), E(0) #1955973
統計: A(29), B(44), C(145), D(38), E(0) #1955973