题目内容：

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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.