完形填空

How do we give a computer instructions?

　　We give a computer instructions 　　1　　 putting a program into it．The program is 　　2　　 a human being, and it is essential that the human does not make a mistake．If we want a computer to do different jobs, we 　　3　　 give it different programs．

Is a computer cleverer than I am?

　　The answer 　　4　　 this question is, for the time being,‘No’．Your brain can understand the meaning of things better and create new ideas．　　5　　, one day computers may be able to do most things that a human brain can do and do them better．They may be better than doctors, judges and teachers at doing their jobs．

　　If this is true, it 　　6　　 interesting questions．What will happen 　　7　　 us if computers can do our jobs?How will we spend our lives? Will we have nothing to do? Computers may change our lives．But will they make 　　8　　 better?

CD-ROMs

　　Many of today's computers have CD-ROM drives．A CD-ROM can hold over 300,000 pages of writing, and can also contain pictures and sound．Thus, 　　9　　, you can use your computer to read about a famous person in history such as John F Kennedy, and you can see a photograph or video of him, and even listen to him speaking．Some people think that CD-ROMs will 　　10　　 be more popular than books．

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完形填空。

　　Students in many countries are learning English．Some of these students are small children．　　1　　 are teenagers．Many are adults．Some learn 　　2　　 school, others 　　3　　 themselves．A few learn English by 　　4　　 the language over the radio, on TV, or in films．One must work hard 　　5　　 another language．

　　Why do all these people want to learn English? It is difficult 　　6　　 this question．Many boys and girls learn English at school because it is one of their 　　7　　．They study their own language and math and English．Some people learn it because it is 　　8　　 for their work．Many people learn English for their high studies, because in college or university some of their books are 　　9　　 English．Other people learn English because they want to 　　10　　 newspapers or magazines in English．

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阅读下列短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。

　　Why don't birds get lost on their long flights from one place to another? Scientists have puzzled over this question for many years．Now they're beginning to fill in the blanks．

　　Not long ago, experiments proved that birds depend on the sun to show them the way during daylight hours．But what about birds that mainly fly at night? Tests with man-made stars have shown that certain night-flying birds are able to follow the stars on their long-distance flights．

　　Once such bird-a warbler-had spent its lifetime in a cage and had never flown under a natural sky at night．Yet it showed an inborn ability to use the stars．The bird's cage was put under a man-made star-filled sky．The bird tried to fly in the same direction as its outdoor cousins．Any change in the position of the man-made stars caused a change in the direction of its flight．

　　Scientists think that warblers, when flying in daylight, use the sun for guidance．But stars are their main dependence of flying at night．What do they do when stars are hidden by clouds? They find their way by such landmarks as mountains, beaches and rivers．But when it's too dark to see these, the warblers circle helplessly, unable to get their directions．

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