(当前文档不提供在线查看，请下载使用！)
Unit 3 Sports and fitness
1.fit----fitness ill---ilness kind----kindness
2.come along:跟随，到达，进步，赶快
come across:偶然遇见
come out: 出现；出版；开花
come up: 破土发芽；升起；即将出现
come up with: 提出，想出
3.track:n. keep/lose track of 了解/不了解...的情况；与....保持/失去联系
be on the right/wrong track 思路正确/错误
track down追踪到
4.master...