P23 4-2 二、听录音，选择正确答案。

1. A: Which bed is the most comfortable of the three? 

    B: The green one. 

2. A: What do you want to be in the future? 

    B: I want to be an astronaut. 

3. A: Why do you like science best? 

    B: Because I think it is more exciting"and"interesting than the other subjects. 

4. A: Who is more careless, Jim or Ken? 

    B: I think Ken is less careless.