2 . Tristin Stewart, 15, of Northern Ireland, has no right knee after undergoing an operation. Now, his right leg connects directly to a right foot backward, which fits more_______than a traditional amputation (截肢).

Tristin said he began experiencing_______in his right leg in 2014, but it was not until last year that doctors diagnosed it as a cancer. The diagnosis and_______operation made Tristin’s parents, Mandy and Shane so worried.

“Tristin was scared firstly before receiving the operation,” Mandy said. “When we went in to see him after the operation, you could_______see that something was not in the right place under the_______, and Shane and I got up the courage to uncover it. That was a very strange sight, but my boy’s life was saved so that’s all that_______.”

In spite of a_______disease, the first in Northern Ireland, the soccer-loving teen is already back on his_______ just months after the operation.

“At the start it was uncomfortable and I wasn’t used to it because of the weight and my foot — you know, it felt_______— but now I’ m accustomed to it,” Tristin told Caters News. “It feels close to normal.”

“I can________with it and I’ve just started a jog,” Tristin said. “Without it, I’d be in a________. I wouldn’t be able to do anything.”

Unexpectedly, many people are now________ money to buy Stewart professional aid equipment so he can________in sports and more physical activities.

“Friends have been just as________, and they haven’t treated me differently,” Tristin added. “And I believe no matter how________ the mountain, there will always be a climb for the people who do not fear the difficult.”