6. How many years have people used the telephone?

A. More than 120 years.      B. More than 130 years     C. More than 140 years.

5. A. Because of too many people.     B. Because of pollution.      C. Because of less water.（二）录音中有五组对话，听对话两遍后，从每小题A、B、C中选出能回答所给问题的正确答案。

4. A. Of course not.                    B. You’re welcome.         C. Good idea.

3. A. I’m sorry to hear that.                   B. Since last month.        C. Yes, I have.

2. A. What sign?                      B. Why?                  C. Sorry, I didn’t see it.

1. A. Thank you.                      B. Yes, I think so.           C. No, I’m not.