Anyhow, knowing how to use the Internet is important. The key is to have good self-control. When you come across(遇到) a difficult problem, think about it by yourself first. Be sure to understand the reasons behind the answers after you have turned to the Internet, or you won’t make proGREss. If you are not sure about your self-control, ask your parents for help.

　　51. Both Li Ting and Wu Qiong used the Internet to _____

　　A. play games B. search information C. take exams

　　【答案】B

　　【解析】细节题。根据题干定位到第一段第二句She searched online for certain information and made PowerPoint presentations(展示).和第二段倒数第二句So he took out his mobile phone, opened a special app(应用软件)，and searched the problem.得出，Li和Wu都是通过网络去找寻信息，那么与之对应的答案就是B，难度较易。

　　52. Paragraph 4 is mainly about_____ of doing homework with the help of the Internet.

　　A. the advantages B. the disadvantages C. the problems

　　【答案】A

　　【解析】细节题。该题属于细节题推断，那么根据第四段第一句It’s convenient，是方便便捷的，这是属于好的方面，再根据该段后文的What’s more、especially连接的内容，都是在说好的方面，那么根据选项C和B，得出答案位A(优点的意思)。难度中等。