다음 글을 읽고, 빈 칸에 들어갈 말로 가장 적절한 것을 고르시오. Learning to ski is one of the most humbling experiences an adult can undergo (that is one reason to start young). After all, an adult has been walking for a long time; he knows where his feet are; he knows how to put one foot in front of the other in order to get somewhere. But as soon as he puts skis on his..