1. Factories and cars pollute the air in crowded conditions and cause garbage in the streets. In order to solve these problems, some people believe we should limit the size of our cities. Others believe cities cannot be limited in size and the problem must be solved in different ways, for example by increasing green areas and stopping factory pollution.

　　参考译文：工厂和汽车在人流密集区域会造成空气污染，导致街道四处都是垃圾。为了解决这些问题，有些人认为我们应该限制城市的规模，其他人认为不能限制其规模，而是要用不同方法解决这个问题，比如增加绿地、制止工厂污染物的排放。

　　解析：高频词：limit限制，increase增加，pollute污染，solve the problem 解决问题。

　　2. Often, we find it hard to keep a conversation going not because we can’t think of anything to say, but because we fear the other person won’t enjoy that particular subject, fact or opinion. However, most of time, this is not real. Give it a try, and you’ll discover that people can enjoy a lot of things in a conversation.

　　参考译文：我们常常发现持续某场谈话很难，这并不是因为我们想不出该说什么，而是因为害怕对方不喜欢某个话题、事实或观点。然而大多数时候这并非事实。尝试一下，你就会发现人们在谈话中有很多东西可以享受。

　　解析：particular特定的。

　　3. According to the results of a new poll, sunshine was found to be largely responsible for our good mood. Waking up to a sunny day, sitting in the sun, having a picnic in the sun, and driving with the car windows down on a sunny day all made it into the top 20 of life’s greatest pleasures.

　　参考译文：一项新的民意调查结果发现，我们的好心情很大程度上是由阳光带来的。醒来时发现阳光灿烂、坐着晒太阳、在太阳下野餐或者在大晴天放下车窗开车，这些都排在生活中最高兴的事情的前20位。

　　解析：poll 民意调查，be responsible for 对……负责；导致。