第3题: [单项选择]The seller signed the ______, promising to ship the goods before the end of July. A. contact B. treaty C. contrast D. contract 参考答案:D 答案解析:词义辨析题。contact“联系、接触”;treaty“和约、协定”;contrast“对比、对照”; contract“合同”,是谓语动词sign的最佳宾语。D为正确答案。句意:销售商签了合同,同时