142. An advantage of using the solar energy is that it wont create any pollution.使用太阳能的优点是它不会产生任何污染。 　　143. 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。 　　144. So precious is time that we cant afford to waste it.时间是如此珍贵，我们不能浪费它。 　　145. 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。 　　146. The harder you work， the more progress you make.你越努力，你越进步。 　　147. The more books we read， the more learned we become.我们书读得越多，我们越有学问。 　　148. To average people， they often tend to live under the illusion that English often means a good opportunity for ones career， is this really the case？对于一般人来说，他们常常以为掌握英语就意味着一份好的工作，然而这是真的吗？ 　　149. By taking exercise， we can always stay healthy.通过体育锻炼，我们能够始终保持健康。 　　150. Listening to music enables us to feel relaxed.听音乐能使我们放松。