四、完形填空。〔人与自然——环境保护〕
Today I'm here to talk about noise pollution. Not all noise is noise pollution. Noise becomes noise pollution 1 it's loud，when it's not 2 and when it gets to harm human and animal life.
Examples of noise pollution 3 the sounds of cars，buses，lorries，trains and planes. When you stand near a bus road，sometimes the noise can hurt your 4 . And people living near airports often find it difficult to sleep. Noise pollution 5 also be from machines. We often use very noisy machines around the house or at the workplace. Factory noise is 6 a big problem. Finally，sometimes loud 7 can be a form of noise pollution，like the music from a club or from your next-door neighbour.
We might think that noise pollution is just a small problem， 8 in fact it can be 9 . Some people have become deaf because of noise pollution. What's 10 ，when people lose sleep because of noise pollution，they become careless. This can 11 accidents，and people can get hurt or even be killed. Finally，noise pollution 12 people feel stressed(有压力的). This can lead to heart disease.
What can we do with noise pollution? We need 13 laws against loud noise. The government also needs to build walls next to roads and airports to 14 people from the noise. Finally，we can all help with noise pollution by turning 15 our radios and TVs，and using a softer voice when we talk.
()1. A. since
B. before
C. after
D. when
()2. A. exciting
B. proud
C. similar
D. necessary
()3. A. reduce
B. include
C. copy
D. display
()4. A. ears
B. eyes
C. hands
D. legs
()5. A. must
B. should
C. can
D. shall
()6. A. too
B. also
C. either
D. neither
()7. A. power
B. music
C. programmes
D. speeches
()8. A. because
B. so
C. moreover
D. but
()9. A. dangerous
B. safe
C. comfortable
D. uncomfortable
()10. A. fewer
B. less
C. worse
D. better
()11. A. lead to
B. look forward to
C. pay attention to
D. make a difference to
()12. A. allows
B. produces
C. makes
D. causes
()13. A. weaker
B. stronger
C. quieter
D. louder
()14. A. prevent
B. provide
C. practise
D. protect
()15. A. around
B. down
C. on
D. up

1~5. DDBAC 6~10. BBDAC 11~15. ACBDB

【分析】
这是一篇围绕噪音污染展开的完形填空，解题需结合上下文语境、词汇词义辨析、逻辑关系及固定搭配。每道题的思考方向：1.根据前后文条件逻辑选连词；2.结合噪音污染的定义选对应形容词；3.根据“例子包含”的含义选动词；4.根据噪音对人体的伤害选身体部位名词；5.根据可能性选情态动词；6.根据副词的位置和用法选合适的副词；7.根据后文举例内容选名词；8.根据前后文转折关系选连词；9.根据噪音污染的危害选形容词；10.根据固定短语选形容词；11.根据“导致事故”的含义选动词短语；12.根据“使某人…”的结构选动词；13.根据法律强度选形容词比较级；14.根据固定搭配“保护某人免受…”选动词；15.根据固定短语“调低音量”选介词。
【解析】
1. 第1题：前文说明噪音成为污染的条件，后文是时间状语，用when（当…时），选D。
2. 第2题：噪音污染的条件之一是“不必要的”噪音，necessary（必要的），选D。
3. 第3题：噪音污染的例子“包括”各类交通工具的声音，include（包括），选B。
4. 第4题：噪音过大时会伤害耳朵，ears（耳朵），选A。
5. 第5题：噪音污染“可能”来自机器，can（可能），选C。
6. 第6题：also用于句中表示“也”，符合语境，选B。
7. 第7题：后文举例俱乐部的音乐，属于music，选B。
8. 第8题：前文认为噪音污染是小问题，后文转折说明其严重性，用but，选D。
9. 第9题：噪音污染会导致耳聋等，是危险的，dangerous，选A。
10. 第10题：固定短语what's worse（更糟糕的是），选C。
11. 第11题：噪音导致睡眠不足，进而引发事故，lead to（导致），选A。
12. 第12题：固定搭配make sb do sth（使某人做某事），make people feel stressed，选C。
13. 第13题：需要更强的法律治理噪音污染，stronger（更强的），选B。
14. 第14题：固定搭配protect sb from sth（保护某人免受…），选D。
15. 第15题：固定短语turn down（调低音量），选B。
【答案】
1~5. DDBAC 6~10. BBDAC 11~15. ACBDB
【知识点】
完形填空词汇辨析、语境理解、固定搭配
【点评】
本文围绕环保主题的噪音污染展开，贴近生活实际，考查基础词汇、逻辑关系及固定搭配，难度适中，适合初中阶段学生练习，能帮助学生了解环保相关知识。
【难度系数】
0.6