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第3部分：概括大意与完成句子(第23～30题，每题1分，共8分)
下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第1～4段每段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。
Cell Phones
1． Believe it or not，cell phones have been around for over a quarter of a century．The first commercial cell phone system was developed by the Japanese in 1979．But cell phones have changeda lot since that time．The early cell phones were big and heavy but they have developed into smalland light palm-sized models．There have been huge developments in their functions，too．We havehad cell forwarding，text messaging，answering services and hands-free use for years，but now thereare countless new facilities，such as instant access to the internet and receiving and sending photos．
2． Cell phones have become very common in our lives；recent statistics suggest as many as one in three people on the planet now have a cell phone，and most of them say they couldnt live without one．Cell phones are used in every area of our lives and have become a necessary tool，usedfor essential arrangements，social contact and business．They have made it easier to call for help onthe highway．They have made it possible to keep in touch with peopleon the movewhen peopleare traveling．
3． Cell phones have made communication easier and have reduced the need for family argu ments．We can use cell phones to let our family know well be late or if theres a change of plan oran emergency．Cell phones have eased the worries of millions of parents when their teenagers are outlate，they can now contact their children at any time．
4．This does not mean that cell phones are all good news．They have brought with them anumber of new headaches for their owners：it costs a lot to replace stolen phones，something that isbecoming a frequent occurrence，and have you ever seen such huge phone bills? More serious，however，is the potential health problem they bring：there are fears that radiation from the phones maycause brain tumor(肿瘤)。This may be a time bomb waiting to happen to younger people who havegrown up with cell phones that they simply cant live without．
23．Paragraph 1_________________
24．Paragraph 2_________________
25．Paragraph 3________________
26．Paragraph 4_________________
A．Cell phones and the family
B．Commercial cell phone systems
C．Cell phones in everyday life
D．Cell phones for teenagers
E．History of cell phones
F．Problems with cell phones
27．Nowadays cell phones are equipped with_______________
28．Cell phones are common in our lives and have become________________
29．We can use cell phones to communicate with others when we encounter_________________
30．In spite of many benefits，cell phones have brought for their owners_________________
A．a necessity．
B．an emergency．
C．a number of new headaches．
D．family arguments．
E．big and light palm-sized models．
F.countless new facilities