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The police find most criminals (罪犯) because somebody tells them who the criminals are.They find other criminals by using science and their computers.When there is a bank robbery (抢劫), the police first look through their computers for the names of the bank robbers that they know about.Then they go and talk to any of these robbers who are not in prison (监狱).They ask them where they were when the robbery happened.If any of these people cannot give a good answer, the police will often use science to find out if one of them is the robber.

Many criminals leave something of themselves at the places of the crimes like a fingerprint or a hair.Or they take something away on their shoes or clothes, like dirt or animal hair.If they leave behind some of their blood or their hair or a piece of skin, it will have their DNA inside it.

Everyone’s DNA is different and their fingerprints are also different.So, if a criminal cuts himself during a robbery or leaves his hair, or even a small piece of skin, scientists can find out what his DNA is.The police can then ask the person they think is the robber to give them his hair or some blood and see if it has the same DNA.Many criminals are in prison today because of this kind of evidences .

根据上文内容判断正 ( T ) 误( F )

51.Usually the police find criminals because they use their computer.

52.The police do not usually ask criminals who are in prison about a crime because these criminals could not have done it.

53.The most useful evidences that criminals leave at the places of their crimes are things with their DNA in them.

54.Many criminals usually take something away only on their shoes after the crimes.

55.The story is about a bank robbery.

E 日常对话

W: Hello, Han Lin.

H: Hello, Xiao Hua.

W: 56

H: I’m reading about today’s newspaper.It says every week students in primary

schools have a day without homework. 57

W: I think it’s great. 58

H: That’s impossible.But after the big exam, we’ll also have a long summer

vacation and needn’t do any homework.

W: I’m looking forward to it.Have you made any plans for it?

H: 59 I’m going travelling.But I haven’t decided where to go.

W: 60

H: Good idea.I also hear Taiwan is a nice place.I’ll think about it.Thank you for

your advice.

W: It’s a pleasure.

A.Why not go to Taiwan?

B.We can have more time to enjoy ourselves.

C.No, not yet.

D.How do you feel about it?

E.What are you up to?

F.Yes, of course.

G.I wish I were still in primary school.

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