单选题 As we are on the point of some important business with them, we should like to know exactly about their credit ______.
【正确答案】 C
【答案解析】[解析] 四个选项的意思为：A项“传送”；B项“转让”；C项“交易”；D项“运输”。根据题目的意思结合选项应选C项。