18. The situation will worsen unless some steps are taken to stop it.
19. Time is more than money.
20. We should spare no effort to make a success of our career.
spare no effort to do: 不遗余力地去做某事
21. It pays to take part in social works in order to know the outside world better.
22. Listening to music enables us to feel relaxed.
23. We should bring home to people the value of working hard.
bring home to sb something: 让某人了解某事物
24. Taking exercise is closely related to health.
25. The condition of our traffic leaves much to be desired.
26. …change the course of history… …turn over a new leaf… …shape the destiny of a nation… …shape the world… …break a new ground…
27. Smoking has a great influence on our health.
28. Pollution poses a great threat to our existence.
pose a threat to: 对...造成威胁