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阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Do you know about Dolly, a famous sheep? She 1.________ (create) by cloning more than fifteen years ago in Scotland. Cloning is famous throughout2.________world. It is a process used to make an animal that is3.________ (exact) like its parent. So far, scientists 4.________ (clone) rabbits, sheep, cows, mice, pigs and some other animals.

But what makes cloning possible? It’s DNA. There is DNA in most living things, 5.________

(include) human beings. Your DNA is the same in every part of your body. For example, your fingernails have the same DNA as your hair. You have your own DNA, 6.________is similar to your parents’, but not the same. However, Dolly’s DNA is the same as 7.________of the sheep she was cloned from.

There’s no doubt that cloning can help save those animals in danger. It can also be 8.________ (benefit) to human beings. With its help, scientists are able to explore more ways to treat many serious diseases. However, cloning could be used in some ways to harm 9.________ (social), too. So all governments should make laws 10.________ (make) sure it can be used properly.

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