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。

　　Among all the fast growing science and technology, the research of human genes, __1__ biological engineering as people call it, is drawing more and more attention now. Sometimes it is a hot topic __2__(discuss) by people.

　　The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with, such as cancer and heart disease. Every year, millions of people are murdered by these two __3__(kill). And to date, doctors have not found __4__ effective way to cure them. But if the gene technology __5__(apply) , not only these two diseases can be cured completely, __6__(bring) happiness and more living days to the patients, but also the great amount of money people spent on curing their diseases can be saved, so __7__ benefits the economy as well. In addition, human life span(寿命) can be prolonged.

　　Gene technology can help people to give birth to more healthy and clever children. Some families, with the English imperial(皇室) family being a good example, have hereditary diseases. This means their children will for sure have the family disease, __8__ is a great trouble for these families. In the past, doctors could do nothing about hereditary diseases, __9__ gene technology can solve this problem __10__(perfect). The scientist just needs to find the wrong gene and correct it, and a healthy child will be born.

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