单项选择题
A.Certificate of empty tank; Certificate of fumigation B.Certificate of fumigation; Certificate of cleanliness C.Certificate of empty tank; Certificate of cleanliness D.Certificate of cleanliness; Certificate of empty tank
A.letter of credit; letter of guarantee; license B.letter of guarantee; letter of credit; license C.letter of guarantee; license; letter of credit D.license; letter of credit; letter of guarantee
A.如果卖方不提供可靠的货物标签,这笔款项应被归还。 B.如果卖方不提供可靠的所有权凭证,这笔款项应被归还。 C.如果卖方不提供可靠的货物标签,将不提供这笔款项。 D.如果卖方不提供可靠的所有权凭证,将不提供这笔款项。