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,  1 newspapers, watch TV and search on the Internet to learn something new. I often see 2 do Taijiquan in the morning and dance in the evening. She looks young and beautiful 3 she is over seventy. Last week a reporter from a magazine interviewed her and asked 4she kept so young and healthy. She replied with a smile:
   I have a secret of staying young and healthy. It is quite 5. Keep your mind active, take an interest in the world 6 you., and learn at least one new thing every day. Try to do different kinds of housework and do sports as  7 as you can. Don’t think you are too old to go back to8. 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 9 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 10 the lady’s example. I hope all people will stay young and healthy.

如图是一把剪刀，其中∠1=40°，则∠2=____ 

依据例句，仿写句子。（2分）
例句：不是所有的顺从都表达虔诚，就像不是所有的反对都表达憎恨。
仿句：                                 ，                                  。

如图所示，已知在三角形纸片ABC中，BC=3，AB=6，∠BCA=90°．在AC上取一点E，以BE为折痕，使AB的一部分与BC重合，A与BC延长线上的点D重合，则DE的长度为（　　）

阅读以下关于长江输沙量变化的报道，回答下列问题。

据新闻媒体最近报道：“每年，长江水滚滚东流，泥沙俱下，其中一半左右在长江口至杭州弯北岸一带沉积，上海就是在河口滩涂上‘日长夜大’的，上海土地面积的62%来自长江泥沙的堆积，而未来长江口泥沙淤积成的滩涂，是上海后备土地资源的主要来源。据统计，1949年至1984年，长江水年均携带4.86亿吨泥沙入长江口，而1985年至1999年的年均输沙量为3.35亿吨，专家预测，三峡水库蓄水后，长江年均输沙量将继续减少。”