阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
The Internet is an amazing information resource. Students, teachers, and researchers use it as  investigative tool. Journalists use it to find information for stories. Doctors use it to learn more about unfamiliar diseases and the   (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     countries and cultures. However,      there are many positive developments     (associate) with the Internet, there are also certain fears and concerns.       concern relates to a lack of control over  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      (restrict) on what kinds of programs can    (broadcast) and at what times of the day. With the Internet, parents cannot check a published guide to determine what is suitable    their children to see.