题目内容：

Most parents in Britain log onto social networking sites like Facebook to spy on what their children are doing, a study has found. Figures showed that nearly 55% of parents thought of snooping_around on their children’s profiles (基本信息) to see what they are up to. They did it to avoid having “awkward conversations” with the children but nearly a quarter admitted it was the only way they could find out about their lives.

Websites like Facebook and MySpace along with microblogging site Twitter have become popular among teenagers and children. Figures from the Office for National Statistics show that last year among 16 to 24­year­olds,75% posted messages on them. The majority of 13 to 16­year­olds have more than 100 “friends” on Facebook while more than 750,000 are using the website below the age limit, which is 13.

Experts and parents however have expressed anxiety about how they can monitor what the young are up to when they go online. Almost one in 20 mothers and fathers even log on with a friend’s account to avoid detection and gain better access to their children’s profiles.

While 55% said they did spy on their children, 40% said they did not, but the remaining 5% said they would do if they knew how.

Some 41% monitor their children’s status updates and 39% look at their “wall”， which is where they and friends can write things. Just under one third, 29%, looked at pictures their children had uploaded (上传)．

When asked why they behaved like they did, 6% of parents blamed their “overprotective” instincts (本能) and 14% admitted they were just being curious.

1.What do the underlined words “snooping around” probably mean?

A. Posting messages freely.

B. Investigating secretly.

C. Moving around casually.

D. Communicating easily.

2.According to the passage, what makes experts and parents worried?

A. What children write in their profiles.

B. Whom the children would make friends with.

C. Why teenagers like posting messages online.

D. How they can monitor children’s online behavior.

3.According to the study, ________.

A. more than one third parents monitor their children’s status updates

B. uploading pictures is bringing children great danger

C. most parents are against making net friends

D. few parents know what “wall” is

4.According to the passage, which of the following is NOT true?

A. Experts and parents want to know what the young do online.

B. People younger than 13 are not allowed to use Facebook in Britain.

C. Under one third of parents looked at pictures their children had uploaded.

D. About 25% of parents have many ways to find out about their children’s lives.