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　　根据短文内容，从方框中选出正确的单词并用其适当形式填空。（有两项多余）

　　however,become,successful,create,that,

　　hot,what,they,work,danger,star,besides

　　China's“artificial(人造的)sun”,the Experimental Advanced Superconducting Tokamak(EAST), has set a new world record. It 1 worked for1056 seconds at a high temperature close to 70,000.000℃,which is about five times 2 than the temperature of the real sun.

　　The high heat 3  in a nuclear fusion reactor(核聚变反应堆)，which is part of the EAST project. It reproduces the natural reactions(反应) 4 happen inside our sun and other 5 . The scientists want to develop the artificial sun to provide near-endless clean energy. The EAST project has cost China more than $950 billion.Total costs will run over $1trillion this year.

　　Scientists around the world have been trying 6 best for many years to develop nuclear fusion.They say it is the best way to provide clean energy,as the nuclear fusion process needs no fossil fuels(化石燃料) and leaves behind no 7 waste.If scientists can make it 8 ,the world will become greener and cleaner. It also means the lower cost of fuels.

　　Nuclear fusion technology is still not developed enough 9 a global industry.10 .researcher Dr Gong Xianzu. a nuclear fusion scientist says the EAST project is an important step and that the recent operation lays the foundation(基础)for the running of a fusion reactor.

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　　7._________   8._________   9._________

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