下列哪个短语的意思是“30%预付款，余款发货前付清”？
A. 30% TT in advance, the balance to be paid against B/L
B. 30% TT in advance, the balance to be paid before delivery
C. 30% TT in advance, the balance to be paid against the copy of B/L
D. 30% TT in advance, the balance to be paid within 10 days after B/L date
下列哪个短语是“不可撤销的30天远期信用证”
A. The irrevocable L/C after 30 days’ sight
B. The confirmed L/C after 30 days’ sight
C. The confirmed, irrevocable L/C after 30 days’ sight
D. The confirmed L/C in 30 days’ sight
下列哪个短语是“即期付款交单”？
A. D/P at sight
B. D/A at sight
C. D/P after sight
D/A after sight
13.下列哪句是“我们建议30%的预付款，余款采用不可撤销的信用证（30%前TT+70%L/C）”的正确翻译？
A. We propose 30% down payment and the balance to be paid by an irrevocable L/C
B. We propose 30% down payment, the balance is to be paid by an L/C
C. We propose 30% down payment and the balance to be paid by a confirmed L/C
D. We propose 30% down payment and the balance to be paid by an revocable L/C
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