单项选择题
The importers had agreed to documents against （）, so the exporters drew a sight draft on them.
A. payment B. remittance C. letter of credit D. acceptance
单项选择题 Should your price （） reasonable, we will place an order （） you.
单项选择题 Marine insurance covering All Risks, War Risks, and S. R. C. C. for full CIF value shall be covered （） the buyer's store in New York.
单项选择题 海关对外商投资企业签发的“进出口货物征免税证明”是按（）签发的。
