网络信息的开放性对于自控能力不强、极富好奇心的青少年具有极大的诱惑力，网络中的黄、赌、毒、暴力等信息严重损害了青少年的身心健康。为此，下列对青少年建议正确的是（    ）

①要树立正确的是非善恶观

②要提高自控力，拒绝不良诱惑

③关停非法经营网吧

④要提高辨别是非的能力，拒绝上网

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

      Both men and women are livinglonger these days in industrialized countries.____Ingeneral, they can expect to live six or seven years more than men. One reasonfor this is biological.

      One important biological factor thathelps women live longer is the difference in hormones between men and women.____Between the ages of about 12 and 50,women produce hormones that are involved in fertility(生育能力). These hormones also have a positive effect on the heartand blood flow. In fact, women are less likely to have high blood pressure orto die from heart attacks.

       ____Theyhelp the body defend itself against some kinds of infections. This means thatwomen generally ger sick less often and less seriously than men. The commoncold is a good example: women, on average, get fewer colds than men.____ Scientists are still not exactly sure howinfluence aging, but they believe that they do. Some think that a woman's bodycells have a tendency(向) to age more slowly than a man's. Others think that a man's body cells have a tendency to age more quickly.____

A．However,women, on average, live longer.

B .The biological factorplays an important part.

C. Women are also helped bytheir female genes.

D. The female hormones alsoprotect the body in another way.

E. Recent research seems tosupport both of these possibilities.

F. Therefore, women are morehealthy than men and can live a better life.

G. Hormones are chemicalswhich are produced by the body to control carious body functions.

    Jack Brown, an office worker, lives in Washington. He inherited（继承）a million dollars when he was 23, but he wasn't happy at all. When his college friends were looking for their jobs, he didn't have to. Jack decided to keep living a simple life like everyone else. He gave $ 10,000 of his money to a charity to help poor children live a happy life. Today he is 36. He still wears cheap shoes and clothes and drives a small car only, but he is very happy.

    Up to now Jack has helped some children from poor countries all over the world, by sending them each $200 a month. The money is used for the children's study, food, medicine and clothing. Jack receives a report each year on the children's progress(进步）They can write to each other, but usually the children do not speak English.

    When Jack first heard about these children, he wanted to help them. “It was nothing special,”he said.“Until I went to these countries and met the children I was helping, I didn't know anything about their life.” Once Jack went to meet a little girl in Africa, he said that the meeting was very exciting. “When I met her, I felt very, very happy,”he said.“And I saw that the money was used for a good cause. It brought me happiness. I want to do everything I can to go on helping these children.”