6. insist on doing 坚持
7. keep an eye on 留意，照看
8. go on doing 继续(某件事因故暂停，尚未做完);一直做某事
9. go on to do 接着(一件事已做完，再去做另一件事)
10. hand on 传下来，依次传递
11. happen on 巧遇;偶然发现
12. have a great effect on 对...有很大影响
13. have / take pity/ mercy on sb. 怜悯某人
14. keep on v.继续,穿着...不脱
15. keep one's mind on 专心于