请阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
For a long time Gabriel didn't want to be involved in music at all. In his first years of high school,Gabriel would look pityingly at music students,1across the campus with their heavy instrument cases.2at school for practice hours3anyone else had to be there.He swore to himself to4music,as he hated getting to school extra early.
5 ， one day，in the music class that was 6of his school's standard curriculurn，he was playing idly （随意地）on the piano and found it 7to pick out tunes.With a sinking feeling,he realized that he actually 8doing it.He tried to hide his 9pleasure from the music teather, who had 10over to listen. He might not have done this particularly well,11the teacher told Gabriel that he had a good12and suggested that Gabriel go into the musin store-room to see if any of the instruments there13him. There he decided to give the cello（大提琴）a 14. When he began practicing, he took it very 15. But he quickly found that he loved playing this instrurnent, and was 16to practicing it so that within a couple of months he was playing reasonably well.
This 17, of course, that he arrived at school early in the morning,18his heavy instrument case across the campus to the 19looks of the non-musicians he had left20.