单项选择题

I am very sorry ______ you such a lot of trouble by the delayed shipment.

A.caused
B.causing
C.to have caused
D.to be caused
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单项选择题
Flying Blue is a rewards program specially intended for ().

A.first class travelers
B.business executives
C.frequent passengers
D.VIP members

问答题
说明:假设您是某公司销售部经理David Wang,给总经理写一封电子邮件,内容包括: 1.本人参加了美国纽约电子产品展销会,为期一周; 2.本公司设了3个展台,产品深受客户欢迎; 3.有5家美国公司与我们签订了销售合同; 4.我们的产品在美国市场一定会有良好的前景; 5.客户希望我们能够提供优质售后服务。 Words for reference:电子产品展销会 electronic products fair售后服务 after-sales service
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