How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the US.
For some parents, the Interact can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as danger and with good guides, some education, and a few precautions(预防), the wilds of the Internet can be safely navigated. “Kids have to be on-line. If we tell our kids they can' t be allowed to surf the Internet, we' re cutting them off from their future.”said an expert.
Most kids have started to use search engines. Many of them are great for finding tons of interesting Internet sites, and they can also locate places where you might not want your kids to go. There are search  engines designed just for kids. A certain software contains only sites that have been selected as safe. The most popular way would be to use what is known as a “content screener”. But this can't be wholly reliable (可靠), and the best thing parents can do is to talk to their kids and let them know what is OK or not OK to see or do on the Internet. Another way is that mum or dad is nearby when the child is surfing the Internet.
A few other tips:
—Don't put the PC in a child's room but keep it in an area where mum or dad can keep an eye on things. That also makes the Internet more of a family activity.
—Ask your child what he or she has been doing and about any friends they make online.
—Tell your child not to give on-line strangers personal information, especially like address and phone number.
And tell your children never to talk to anyone they meet on-line over the phone, send them any- thing, accept anything from them or agree to meet with them unless you go along.
69. What is the main subject about the passage?
A. Opposing children's on-line.                B. Internet in America.
C. American children going on-line.            D. Appreciating the Internet.
70. What is the best way to protect children from improper material?
A. To talk to the children and persuade them to tell right from wrong.
B. To be nearby when they are surfing the Interact.
C. To fix a content screener on the computer.
D.To buy some search engines for children.
71. According to the passage, we can infer that       
A. softwares fit for children want programming   B. the Internet contains a lot of harmful sites
C. the Internet will be protected by law          D. a child who is on-line is in danger
72. What does the passage tell us most?
A. Education.       B. Good guides.       C. Precautions.      D. Software.