1 . 听下面一段独白，回答以下对话。
1. What is the speaker doing?

A．Doing a survey.

B．Conducting a lecture.

C．Recommending an exercise.

2. How many days do inactive people feel bad per year on average?

A．35.

B．43.

C．53.

3. What sport might have more positive effect?

A．Basketball.

B．Cycling.

C．Running.

4. What seems to be the speaker’s opinion?

A．A perfect balance is a must while exercising.

B．A right type of exercise is more important.

C．Any exercise is better than no exercise.