阅读下面的短文，从每题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项
It is very important to stay healthy. I have a neighbor. She is an old lady. She can do all the housework,      31_ newspapers, watch TV and search on the Internet to learn something new. I often see 32   do Taijiquan in the morning and dance in the evening. She looks young and beautiful     33    she is over seventy. Last week a reporter from a magazine interviewed her and asked      34    she kept so young and healthy. She replied with a smile:
I have a secret of staying young and healthy. It is quite  35  . Keep your mind active, take an interest in the world  36  you., and learn at least one new thing every day. Try to do different kinds of housework and do sports as   37   as you can. Don’t think you are too old to go back to   38  . I know a man who entered a medical college when he was 70 years old. He studied there for 6 years and now he is a doctor. Another man went to a tennis school at the age of 72 and now he is good at  39  tennis. Some people may say staying young is easy only for those who live in the future. In fact, no matter how old you are, you can make it.
Please tell the story to your family. It would be a good start to    40  the lady’s example. I hope all people will stay young and healthy.

In China, more and more middle school students are getting      sleeping time than before.Most students sleep less than 8 hours every night       they have too much homework to do. Some homework is given by their teachers. And some by their        .Also , some students don’t know how to save time, they are not       enough while they do their homework., so they make many mistakes, and it takes them a lot of time. Some students_ too much time watching TV programs or playing computer games. They    very late. Some students have to get up early every morning on weekdays to get to school on time     bus or bike. It can be a      time from home to school.
School and parents should cut down some of the     so that the children can enjoy more than 8 hours of sleep every night for their health. As we all know ,children are our country’s       .They should be well cared for.

In China , more and more middle school students are getting shorter sleeping time than before. Most students sleep less than nine hours every night, because they have much homework to do. Some homework is given by their teachers, and some by their parents. Also, some students don't know how to save(节省) time. They are not careful enough while they do their homework, so it takes them a lot of time. Some students spend too much time watching TV or playing computer games. They stay up (熬夜) very late. Some students have to get up early every morning on weekdays to get to school on time by bus or by bike. It can be a long way from home to school.
　　Schools and parents should cut down some of the homework so that our children can enjoy more than nine hours of sleep every night for their health. For children, we should make best use of（很好地利用） our time. When we have enough time for sleeping, we will find it much better for both our study and health.
【小题1】What makes most students sleep less than nine hours every night?