20、Listening to music enables us to feel relaxed.听音乐能使我们放松。

　　 Too high expectations from parents and teachers cause students to feel anxious/depressed, making them unable to fall asleep or have appetite.

19、The harder you work, the more progress you’ll make.你越努力，你越进步。

The more books we read, the more learned we’ll become.

我们书读得越多，我们越有学问。

18、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。

17、So precious is time that we can't afford to waste it.时间是如此珍贵，我们不能浪费它。

16、The reason why we have to grow trees is that they can supply fresh air for us.

我们必须种树的原因是它们能供应我们新鲜的空气。

15、An advantage of using the solar energy is that it won't create any pollution.

　 使用太阳能的优点是它不会产生任何污染。

14、There is no doubt that our educational system leaves something to be desired / needs improving..毫无疑问，我们的教育制度令人不满意。

13、It is universally acknowledged that trees play a very important role in environmental protection.全世界都知道树木在保护环境中起重要作用。

12、There is no denying/It can’t be denied that the qualities of our living have gone from bad to worse.　 无可否认，我们的生活品质已经变得越来越糟。

11、We cannot emphasize the importance of protecting our eyes too much.

　 我们再怎么强调保护眼睛的重要性也不为过。