单项选择题 There are approximately 500 （） now in operation in the United States.

单项选择题 Our factory is much more productive now. This year’s production is five times as much （） it was ten years ago.

单项选择题 When you write, （） all the necessary information.

单项选择题 Several people, （） I listed below, have not submitted their reports.

单项选择题 （） your decision to place regular orders with us, we request that you furnish us with two references for the initial purchase.

单项选择题 The performance of the contracted product should be （） the technical specifications stipulated in the contract.

单项选择题 We should appreciate it if you would quote your best prices C.I.F. New York for the envelope openers （） in China Daily.

单项选择题 Salaries for temporary positions seem to be higher than （）.

单项选择题 Because （） renters demanded our rights,a committee was appointed to study the matter further.

单项选择题 Were both your （） cars ticketed on the same day?

单项选择题 Our two （）(Certificated Public Accountants) both asked for leave of absences in June.

单项选择题 The person to win this year's Business Man is thought to be （）.

单项选择题 This year's sales in many companies were lower than （）.

单项选择题 A chart showing all staff positions and responsibilities （） prepared by the Vice President.

单项选择题 The trading company （） a big loss raised a claim against the exporter.

单项选择题 The numbers in the key do not correspond （） those in the lessons.

单项选择题 Send your questions to Mary Adams,（） is the director of Public Relations,for a quick reply.

单项选择题 Our Accounts Receivable Department has written to you three times;（）,we have had no response to our letters.

单项选择题 （）in the labor market,he has enrolled in a computer course.

单项选择题 Information about the current foreign markets （） very important to our company.