题目内容：

听下面一段独白，回答以下小题。

1.When did Dr. Mott start running?

A. When he was a teenager.    B. When he was twenty-seven.    C. When he graduated from high school.

2.How did Dr. Mott value the exercise?

A. It is the key to better work.    B. It is the key to better sleep.    C. It is the key to better health.

3.What should you do when you don’t have exercise for a couple of days?

A. Walk first.    B. Run fast for five days.    C. Pick it up where you left off.

4.What does regulated exercise mean?

A. Running twice a week.    B. Controlling the exercise program.    C. Running a six-mile race.