从所给的A、B、C、D四个选项中选出最佳选项。

　　The Internet has become an important part of teenage life．Most of them use the Internet to get lots of knowledge and 　　1　　．The teenagers keep in touch with their friends online．It's 　　2　　 than phoning someone far away and e-mail is 　　3　　 much quicker than ordinary mail．

　　But some teenagers are not using it 　　4　　 the right way．Some of them would find life difficult without it．Some teenagers spend 　　5　　 time online．Some of the students who used to do well at school are now failing in exams because now they spend most of their 　　6　　 playing games online．

　　It is 　　7　　 for teenagers to use the Internet properly．They should learn 　　8　　 to use the Internet for study and keep away from 　　9　　 websites．They should make sure that surfing the Net doesn't 　　10　　 their homework or being with their friends．

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　　Ten-year-old Johnny was one of the laziest boys in his class．His homework was always 　　1　　 and it was usually wrong．He only did half the number of math problems 　　2　　 the other children did and in his compositions he 　　3　　 half the number of words．And usually the words were 　　4　　 spelled because he was too lazy to use a 　　5　　．

　　One day his class went on a bus trip．The 　　6　　 did not want to take Johnny with them．But there was no one to look after Johnny at the school so she had to take 　　7　　．

　　“Now, children,”the teacher said,“On our bus trip we will 　　8　　 old buildings, some beautiful countryside, and many other things．I want you to write about 　　9　　 nteresting you see on the trip．”

　　The bus trip 　　10　　．The children looked out of the windows at all the interesting things．

　　They took notes 　　11　　 their notebooks．The teacher was very 　　12　　 with them．

　　Then she saw Johnny 　　13　　 on the floor of the bus and went up to him．

　　“Are you 　　14　　?”she asked him．

　　“No．”he said．

　　“Then 　　15　　 are you lying on the floor?”

　　“If I can't see anything,”he said,“I can't write about it, can I?”

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　　Today people can use the phone to talk with others almost anywhere on the earth．But 　　1　　 you use the phone, you can’t see the person you are talking with．That 　　2　　 change in the future．

　　Now some people are using a kind of telephone called the picture phone or a vision phone(视频电话)．Two people 　　3　　 are talking can see each other with it．

　　Picture phones can be useful when you have 　　4　　 to show the person you are calling．They may have other uses in the future．One day you may be able to ring up a 　　5　　 and ask to see a book．Then you’ll be able to 　　6　　 the book over your picture phone．Also you may be able to do shopping through your picture phone．If you see something 　　7　　 the newspaper that you want to buy, you can 　　8　　 the shop．People at the shop will show you the thing you’re 　　9　　 in over the phone．You’ll be able to shop all over the town and never even leave your room．

　　The picture phone is really a 　　10　　 phone．More and more people will use it．

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