閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（不多于3個(gè)單詞）或括號內(nèi)單詞的正確形式。

The Internet is an amazing information resource. Students, teachers, and researchers use it as 1. investigative tool. Journalists use it to find information for stories. Doctors use it to learn more about unfamiliar diseases and the 2. (late) medical development. Ordinary people use it for shopping, banking, bill-paying, and communicating with family and friends. People all over the world use it to connect with individuals from 3. countries and cultures. However, 4. there are many positive developments 5. (associate) with the Internet, there are also certain fears and concerns. 6. concern relates to a lack of control over 7. appears on the Internet. With television and radio there are editors to check the accuracy or appropriateness of the content of programs, and with television there are 8. (restrict) on what kinds of programs can 9. (broadcast) and at what times of the day. With the Internet, parents cannot check a published guide to determine what is suitable 10. their children to see.

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