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. If He _____（21） to climb it for the _____（22） time next month. 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 8,844-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 terrible 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._____.
How to fill in (30)？
A.sure B.afraid C.proud D.curious正确答案D
