I'm Doctor Smith.I'm a health expert.My team and I did a survey about students' free time activities yesterday.One of our questions was about exercise.And of course it was the most important one.From the survey，we knew only 25% of the girls often have activities outside.Many girls do little exercise.They don't like P.E.classes and even don't play sports.These girls may face a lot of problems.They may get better and weaker.And they may get sick easily.Wang Jing，a 16-year-old，said， "I don't like doing exercise.I like watching TV on the sofa.I spent at least three hours watching TV a day.My sleeping time is no more than seven hours a day.I often feel tired."
   Some girls said， "We don't have enough time to do exercise.We must help our parents with housework because they are very tired.After a day's work，we do some washing，clean the house and finish the homework.We don't have time for doing anything else."
   Everyone may have these excuses for not doing exercises.As students，you had better exercise every day.You can run in the park after school，which can help you keep healthy.And you can also do other sports，such as swimming and playing football.

（1）What does Dr.Smith do？

He is a health expert.

He is a health expert.

（2）What percentage（百分比） of the girls often have activities outside according to the survey？

25%

25%

（3）How long does Wang Jing spend in watching TV a day？

Three hours.

Three hours.

（4）Why must some girls help their parents with housework？

Because their parents are very tired.

Because their parents are very tired.

（5）Where can students run after school according to Dr.Smith？

In the park.

In the park.