The police find most criminals because somebody tells them who the criminals are. They find other criminals by using science and their ______. For example,when there is a bank robbery（抢劫）,the police first ______ their computers for the names of those who were the bank robbers.
______they go and talk to them. The police ask them where they are when the robbery ______. If some of them cannot give a good ______,the police will use science to find out if they are the robbers.
Many criminals ______ something of themselves like a fingerprint or a hair at the places of the ______. If they leave behind some of their blood or their hair or a piece of skin（皮肤）,it will have their DNA ______ it.
Everyone's DNA is ______ and their fingerprints are also different. So,if a criminal _______ himself during a robbery or leaves his hair,or even a small piece of skin，_______can find out _______ his DNA is. The police can then ask the person who they _______ is the robber to give them his hair or some blood and see _______ it has the same DNA. Many criminals are in _______ today because of this kind of evidences（证据）.
| 【小题1】 | | A．brains | B．guns | C．computers | D．friends |
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| 【小题2】 | | A．look at | B．look through | C．look around | D．look down |
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| 【小题3】 | | A．Then | B．So | C．However | D．Instead |
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| 【小题4】 | | A．ends | B．happens | C．lasts | D．begins |
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| 【小题5】 | | A．plan | B．suggestion | C．introduction | D．answer |
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| 【小题6】 | | A．lose | B．get | C．steal | D．leave |
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| 【小题7】 | | A．banks | B．streets | C．crimes | D．stores |
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| 【小题8】 | | A．inside | B．beside | C．below | D．about |
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| 【小题9】 | | A．important | B．different | C．strange | D．interesting |
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| 【小题10】 | | A．hides | B．finds | C．sees | D．cuts |
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| 【小题11】 | | A．people | B．guards | C．scientists | D．detectives |
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| 【小题13】 | | A．advise | B．think | C．report | D．commit |
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| 【小题15】 | | A．hospital | B．trouble | C．prison | D．public |
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