完形填空题， 共15小题，通读下面的短文，掌握其大意。 然后，从每小题的四个选择项中选出可填入相应空白处的最佳选项。
　　Yuichiro Miura lives by the saying that nothing is impossible. For him, that means climbing Qomolangma,the world’s highest mountain, at the age of 80. He ___21___ to climb it for the ___22___ time next mouth. He reached its top at ages 70 and 75.If he succeeds this time, he will ___23___ the record for the oldest person to climb the 8844-meter-high mountain.
　　The record, ___24___ , is not what pushes him on. Instead, he wants to know how a person of his age will ___25___ and deal with the extreme cold, ___26___ air and low oxygen(氧气) levels on such a high mountain. He believes those ___27___ will add 70 years to the age of his body once he ___28___ to the top. His daughter, Emili Miura, ___29___ others that he will feel like someone 150 years old.
　　“Nobody ever lived that long,and he’s so ___30___ to know how it would be like,” she said. “He would like to know what is the ___31___ of humans.” Emili Miura said her father thinks that one should always set a higher ___32___ for oneself and try to achieve it.
　　Yuichiro Miura faces more dangers ___33___ health problems. He has had three heart operations in ___34___ years,and he suffered two ___35___ bones in a sport accident in 2009.Nobody would say it’s wise for an 80 year old person to make the climb,but Mr.Miura believes that nothing is impossible.