第一部分：完形填空（共20小题；每小题1.5分，满分30分）
When Dave was eighteen, he bought a secondhand car for 200 so that he could travel to and from work more 1_____ than by bus. It worked quite well for a few years, but then it got so old, and it was costing him 2____ much in repairs that he decided that he had better 3_____it.
