单选题 Questions 20-22 are based on the following dialogue.

单选题 Why did John make the call?
[A] He wanted to check the order number.
[B] He wanted to order some computers.
[C] He wanted to report a problem.
[D] He wanted to see the secretary.

【正确答案】 C

【答案解析】[听力原文]11-13
M: Hello, Mary. It's John. I've got something to tell you about the delivery of computers
W: Oh, yeah. How's it coming along?
M: Well, we have problems with the ABC Computer Company.
W: Really? What kind of problems?
M: They haven't delivered the order on time.
W: Oh, no. Why not?
M: I don't know. Would you call them?
W: Yes, of course. What's the order number?
M: It's CPU3861. Mr. Peterson is the contact man.
W: All right. I'll call you back later in the afternoon.
由对话内容可以知道，John打电话的目的是报告即将进行的电脑交货出现了问题。

单选题 What was the problem with the ABC Computer Company?
[A] They got a wrong order number from the caller.
[B] They failed to deliver the computers on time.
[C] They couldn't find the order form.
[D] They made a wrong delivery.

【正确答案】 B

【答案解析】John报告的主要问题是：They haven't delivered the order on time，也就是说该公司无法按照约定的时间交货。

单选题 Who was the contact man in the ABC company?
[A] The salesman. [B] The manager. [C] Mr. Peterson. [D] Mary.

【正确答案】 C

【答案解析】文中男方提到：Mr. Peterson is the contact man，由此可以直接知道联系人是Mr. Peterson。