With a determined（坚定的）________ on his face, Chicago’s Michael McCarthy held on to the banister（扶手） and climbed to the top of the Willis Tower not long ago. The Tower is 442 meters tall, the ________ building in the US.

As he got to the last step, McCarthy ________ fell down, but that didn’t stop him. The 14­-year­-old boy finally finished climbing the 2,109 steps and arrived at the top, where he ________ cheers from many people.

“I just want to show people that ________ a kid with no legs can do it, anyone can do it,” McCarthy said.

McCarthy, who was born without legs, has to ________ prosthetic legs（假肢） and use a stick（棍子）to walk. But McCarthy has a strong heart. He believes having a disability shouldn’t stop anyone from achieving his or her success.

He has been in a special school since he was four. When he decided to climb the Willis Tower, his teacher, Jeff Kohn, was moved（感动）by his determination and ________ to help train him. They ________ more than ten hours practicing climbing stairs and keeping balance with the prosthetics and ________ on the steps every day. “________ seems that he never knows how difficult it is. ________ I was so tired that I asked him to rest for a day,” said Kohn. “But he said he was still full of energy and wanted more ________.”

Kohn always walked ________ McCarthy for the climb. “When he saw the last 10 floors, he went faster,” said Kohn. “He’s the bravest sportsman I’ve ever trained.”

McCarthy said he was proud of himself and that the tower now holds special ________. “When I’m older, I’ll point to the building and say ‘________ this building I climbed’,” he said.