1. There is no doubt that our educational system leaves something to be desired.
2. It is an advantage of using the solar energy that it won’t create any pollution.
3. The reason why we have to grow trees is that they can supply fresh air for us.
4. So precious is time that we can’t afford to waste it.
5. Rich as our country is, the qualities of our living are by no means satisfactory.
虽然我们的国家很富有，但是我们的生活质量却令人很不满意。 6. The harder you work, the more progress you make.
7. The more books we read, the more learned we become.
8. To average people, they often tend to live under the illusion that English often means a good opportunity for one’s career, is this really the case?
9. By taking exercise, we can always stay healthy.
10. Listening to music enables us to feel relaxed.