18．What is the most probable relationship between the two speakers?

A．Doctor and patient．          B．Husband and wife．           C．Good friends．

17．Why does the boy want to travel around the world?

A．Because he wants to go sightseeing．

B．Because he likes biology and music．

C．Because he wants to study the living things on the earth．

请听第二段对话，回答18―20小题。

16．What do you think the boy is?

A．He is a teacher．                B．He is a biologist．              C．He is a student．

15．A．His science teacher．          B．His Chinese teacher．         C．His mother．

（四）听对话，选择最佳答案，对话听两遍。

请听第一段对话，回答16―17小题。

14．A．She needs a big house．      B．She needs a small house．

C．She needs a beautiful house．

13．A．Argue with his friend．      B．Call his friend．             C．Say goodbye to his friend

12．A．It will be warm．               B．It will be windy．       C．It will be cooler．

11．A．There will be more pollution．

B．There will be fewer accidents．

C．There will be less pollution．

10．A．Yes，it is．                       B．No，I don't know．           C．You're great．

（三）听对话和对话后的问题，选择最佳答案，对话和问题听两遍。

9．A．Well done．                        B．Thank you．               C．I know it．