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butts, glass bottles and plastic bags
1993 the first Clean Up the World Day 30 million volunteers in 80 countries
2001 Clean Up the World Day 40 million volunteers in 128 countries; cleaned streets, beaches, river banks and parks
P67Ex.2
Little is a serious environmental problem.
Cigarette butts are small but bad for the environment. 1 Over 1600 billion cigarettes are smoked each year in China. Many of the butts become littler.
2. 4.5 trillion butts are littered every year in the world. 3. Butts spoil the beauty of the environment.
4. Butts contain toxic chemicals. These get into the water supply. these decrease the quality of the water and endanger living things.
5. Butts take up to 5 years to break down, so the toxic chemicals add up to a great amount.
Plastic bags are a danger to the environment.
1. Plastic bags are made from non-renewable resources. If they are not recycled, these resources are lost to us.
2. In China, 2 billion plastic bags are used every day. Many of these become litter.
3. Plastic bags last from 20 to 1,000 years in the environment.
4. They can travel long distances in the air and water. They are in rivers, parks, beaches and oceans.
5. Plastic bags kill up to one million seabirds, 100,000 sea mammals and countless fish each year worldwide.
6. After the animal breaks down, the plastic bag becomes free and can kill another animals.
The environment would be less polluted if we cleaned up cigarette butts and plastic bags. The best solution would be not to smoke or use plastic bags at all.
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Unit5
课内练习答案（P35Ex.1）
1. Volcanologists study volcanoes so that they can warn people when the volcano is going to erupt and so save many lives. 2. Mount Kilauea is in Haiwaii.
3. The lava flows down the mountain and can cover up or burn villages in its path. The rocks that erupt from the volcano usually don’t damage anything because no one lives near the carter.
4. The night that was caused by the red-hot rocks and gas that erupted from the volcano.
5. The scientists needed to get samples of the lava so they could study them.
6. The author was wearing special protective clothing that made it difficult to walk.
7. The writer finds their beauty and their potential to cause great damage very impressive. P36Ex.1
1the questionnaire 2alongside
3The scientists were evaluating the experiment. 4made my way 5has potential 6appointed 7equipment 8diagram P36Ex.2 1volcano 2erupt 3ash 4lava
5eruption6fountain 7waves 8absolute
9burned to the ground P37Ex.2
1Having taken 2Having given 3Having bought
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4Having spent 5Having arrived P37Ex.3
句子开始到划线部分结束替换为： 1. Having experienced 2. Coming 3. Waking up
4. Having stopped 5. Having spent
6. Having never seen P37Ex.4
1Having arrived 2Standing 3Having taken 4Having rested 5Having heard P38Ex.2
A Frank Gore B Jane Small C Sarah Tang P38Ex.3 横行：
1 5 years 10 years 20 years 2 Alaska Hawaii New Zealand
3 After collecting a sample of lava When back on dry land After the trembling she became excited and forgot to be frightened P38Ex.4 1Jane 2Sarah 3Sarah 4Jane 5Jane 6Frank 7Sarah 8Frank
Workbook练习答案（P69Ex.1） 1c 2e 3g 4d 5a
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6f 7d
P70Ex.1 1fog
2rainbow 3appreciation 4documents 5arrows 6guarantee .P70Ex.2 1panic 2anxious 3actual
4unconscious 5tremble 6waves 7absolutely P70Ex.3
1. Glancing through the newspaper, I found a news report about a typhoon in Guangdong.
2. When I realized the precious necklace had gone, I panicked. 3. House construction varies from country to country. However, in China you can find many diverse styles.
4. He was unconscious after being shot and falling off the balcony. 5. The novelist wrote a wonderful short story about a candidate who wanted to become President of theUnited States.
6. After playing basketball you’ll sweat a lot. If you bathe, I guarantee that you will feel much more comfortable.
7. “Thunderstorm anxiety” is common among dogs, and some dogs tremble with fear under the owners’ beds during thunderstorms.
8. The pilot came out of the plane in his flying suit and boots, with his helmet under his arm. P71Ex.1
2. Watching the volcano erupt, John became worried about his safety. 3. Knowing the children were bored, I tried to make my talk interesting. 4. Knowing the view from the top of the mountain was absolutely fantastic, asue encouraged her friends to make the steep climb.
5. Gathering all my courage, I ran back into the burning house to rescue the baby.
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6. Hearing the volcano was about to erupt, they cancelled their trip. 8. Having made a huge effort to impress the judges, I was disappointed when I didn’t win.
9. Having swallowed the nuts too quickly, I began to cough.
10. Having guaranteed that we would get there before five, I panicked when the car broke down.
11. Having watched Peter training for the race, I knew he had the potential to win the race.
12. Having spent two years writing her book, the novelist went on a holiday. P71Ex.2
1Analysing, fishing 2describing 3opening
4glancing through 5shooting
6arriving P73Ex.
1. climbing onto the roof of the house
2. found a place to sit and took James out of her backpack 3. Rosie climbed up the house roof to join Sara 4. saw a helicopter coming 5. arrived at hospital
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