※ 주어진 부분에 들어갈 가장 적절한 것을 고르시오. [문 7～문 8] We rarely get tired when ______________. For example, I recently took a vacation in the Canadian Rockies up around Lake Louise. I spent several days trout fishing along Coral Creek, fighting my way through brush higher than my head, stumbling over logs, struggling through fallen timber―yet after eight hours of this, I was not exhausted. Why? Because I was excited, exhilarated. I had a sense of high achievement: six cutthroat trout. But suppose I had been bored by fishing, then how do you think I would have felt? I would have been worn out by such strenuous work at an altitude of seven thousand feet.