题目内容：

    A survey made in the UK shows that only 40% of young people know that personal information online stays there forever. There are about 250 million blogs coming out every day, which means a lot of information is shared online. So, are young people using the Internet safely?

Do you know how to change your privacy settings (隐私设置) on social media? For example, you can click on the “settings” on your blog to get to your privacy settings. Then you can decide who sees your personal information: friends, friends of friends or everyone. Do you want everyone in the world to be able to see your email address or just friends?

The BBC Share Take Care campaign (活动), is all about helping everybody, from little kids to the over 55s, to make their online activity safer and protect themselves on the web. The campaign says adults and teenagers need to be more careful with personal information and photos online.

Everybody knows that we should be polite and kind to people in real life and online. Unluckily this doesn't always happen. Where can you report online abuse (辱骂) or unkind messages to yourself or your friends? Do you know how to report such messages online? For example, if you see an unkind message you can click on “more” and then choose “Report”. You can then block (屏蔽) all further messages from that user.

1.How many young people know information online stays there forever?

A.Only a few people. B.Less than a half.

C.More than a half. D.Almost everyone.

2.What does the second paragraph mainly tell us?

A.How to post one's blogs online. B.How to change our email address.

C.How to change our privacy settings. D.How to share our personal information.

3.What's the aim of the BBC Share Take Care campaign?

A.To teach adults to surf the Internet. B.To increase the safety of online activity.

C.To advise kids to stay away from the web. D.To ask teenagers to be careful with Internet.

4.What are you advised to do with an unkind message?

A.Save it. B.Forget it. C.Ignore it. D.Report it.