Hundreds of years ago, life was much harder than it is today. People didn't have modern machines. There was no modem medicine, either. Life today has brought new problems. The biggest one is pollution. Water pollution has made our rivers and lakes dirty. It kills our fish and pollutes our drinking water. Noise pollution makes us talk louder and become angry more easily. Air pollution is the most serious kind of pollution. That's bad to all living things in the world. Cars, planes and factories all pollute our air every day. Sometimes the polluted air is so thick that it is like a quilt (被子) over a city. This kind of quilt is called smog (烟雾). Many countries are making rules to fight pollution. Factories must now clean their water before it is thrown sway. They mustn't blow dirty into the air. We need to do many other things. We can put waste things in the dustbin (垃圾箱) and not throw it on the ground. We can go to work by bus or with our friends in the same car. If there are fewer people driving, there will be less pollution. Rules are not enough. Every person must help to fight pollution.
单选题
Hundreds of years ago, life was much harder than it is today because ______. A. there were not any modem machines B. there was no modem medicine C. there were neither modem machines nor modem medicine
【正确答案】
C
【答案解析】文章第一句就指出几百年前，生活要比今天难得多。紧随其后的是：People didn't have modem machines. There was no modem medicine, either. 这两句话应该是过去艰难生活的原因，所以选C。
单选题
What is the biggest problem in today's life? A. Pollution. B. Air pollution. C. Noise.
【正确答案】
A
【答案解析】文章第二段开头指出：Life today has brought new problems. The biggest one is pollution. 人们现在面对的最大问题是污染。选项B、选项C都是选项A的子集。选其中任何一个都是不全面的。
单选题
What is the most serious kind of pollution? A. Noise pollution. B. Air pollution. C. Water pollution.
【正确答案】
B
【答案解析】关联句是第二段的Air pollution is the most serious kind of pollution. That's bad to all living things in the world. 空气污染是一种最严重的污染，因为它对全世界的生物都造成危害。
单选题
Factories must clean their water ______. A. before it is thrown away B. when it is thrown away C. after it is thrown away
【正确答案】
A
【答案解析】关联句是第三段的：Factories must now clean their water before it is thrown away. 在污水被排放之前，工厂就应对其净化。
单选题
What do we know from the passage? A. A few years ago there was no smog at all. B. We can drink water from the polluted rivers and lakes. C. People can make rules to fight against pollution.
【正确答案】
C
【答案解析】选项A指出一些年前，根本不存在烟雾。这个选项错在时间状语。如果说几百年前，烟雾这种污染现象不存在，就肯定是对的。因为通过阅读文章，我们知道污染是现代社会的新问题。对于选项B，我们通过常识就可以判断它不正确，而且也不符合文章主题。文章讲述了污染形式、危害，倡导我们向污染宣战，不可能让人们去喝污染过的河水、湖水。文章第四段第一句是：Many countries are making rules to fight pollution. 后面具体提到一些规定。所以选项C是正确的。制度规定是对付污染的一种办法，但仅靠这一种办法是不够的。