题目内容：

Questions are based on the following passage.

1.A.18-26. B.27-35. C.36-45. D.46-55.

2.A.Jogging. B.Swimming. C.Tennis. D.Cycling.

3.

A.Launch a new promotion campaign. B.Carry out another survey.

C.Increase the production of athletic shoes. D.Hold more athletic competitions.

4.

A.Make products more appealing. B.Follow the trend.

C.Focus on fitness business. D.Target older customers.