Paper bags produced every year are the world’s production of vehicles. A. three times the weight of B. three times weight of C. as three times heavyas D. three times as heavier as 题目和参考答案——青夏教育精英家教网—

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Paper bags produced every year are ______ the world’s production of vehicles.

A. three times the weight of　　　　　　　　　 B. three times weight of

C. as three times heavyas　　　　　　　　 D. three times as heavier as

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    As bananas ripen， the green skin turns ye11ow gradually. Chemical changes occur in the f1esh of the fruit as well：starch（淀粉）changes to sugar；pectin（果胶）breaks down，losing its stiffness； and the f1esh softens.
Is ripening fruit a self－contained system， or is the rate of these changes affected by the environment？ We designed the experiment below to see if different atmospheres， produced by different packaging， affected the rate of ripening. You will vary the atmosphere surrounding unripe bananas and observe the effect on the ripening process。
Now set up the bananas in their environments as follows：
1. Put two green bananas in a paper bag and fo1d the top over to seal out the air.
2．Put one green banana and the very ripe banana in the other paper bag and fold over the top.
3. Put two green bananas in a plastic bag and seal it.
4. Wrap（包）one green banana tightly in a plastic bag.
5. Leave one green banana exposed to the air.
Leave the fruit a1one or five days to ripen. Ripening fruit“breathes”． This means that it takes up oxygen and gives off C02. Oxygen is extremely important and necessary for the chemical reactions involved in ripening. In addition, ripening fruit gives off another gas, called ethylene（乙烯）. Not only is ethylene a product of ripening fruit, it also promotes the further ripening of the fruit.
Paper bags tend to keep the ethylene in, but they allow oxygen and ethylene to pass through slowly. Plastic bags do not allow the free flow of oxygen or ethylene. In this experiment, the green banana in paper bag with the ripe banana should ripen most quickly. The green bananas in the paper bag should ripen faster than the bananas in the plastic bag. The banana left exposed to air has an unlimited supply of oxygen, so it will turn brown most quickly. You will notice that the side of this banana that rests on the counter will ripen more quickly than the other sides, because it has the
closest contact（接触）with its own ethylene. The banana that is tightly wrapped in plastic has no oxygen supply and should ripen most slowly. Now can you see why bananas are sealed in plastic in many supermarkets？
72. What makes the green banana in Bag 2 ripen more quickly than the ones in Bag 1？
A. Ethylene from the very ripe banana.            B. The free flow of oxygen or ethylene
C. C02 from the very ripe banana.                     D. The limitation of oxygen supply.
73. How can we slow down the ripening of bananas exposed to the air？
A. To rest them on the counter.                                   B. To keep them in the basket.
C. To put them on the ground.                                     D. To hang them up from the ceiling
74. It can be concluded from the passage that          .
A. the ripening banana is a self-contained system
B. the rate of ripening bananas is affected by the environment
C. wrapped bananas experience no chemical changes to ripen
D. ripening bananas give off oxygen, C0, and ethylene
75. Why are bananas sealed in plastic in many supermarkets？
A. To make them ripen more quickly.                B. To make them ripen more slowly.
C. To make banana flesh soften.                        D. To turn green bananas yellow.

To help the environment, many Americans have made the change from paper and plastic bags to reusable grocery bags. But a report by a Florida newspaper says that reusable grocery bags sold by some supermarkets contain high levels of lead(铅). Lead is a metal that can be harmful to humans, especially young children. Now, Senator Charles Schumer is asking the US government to investigate(调查) the use of lead in reusable shopping bags.
“When our families go to the grocery store looking for safe and healthy foods to feed their kids, the last thing they should have to worry about is poisonous bags.” Schumer said, “A quick investigation will allow everyone to make informed, timely decisions.” Schumer added.
Lead in the bags is not likely to rub off on food. But over time, paint on the bags can chip and the bags can wear out. When this happens, lead can be released(释放).
The Tampa Tribune newspaper said certain bags sold at Publix and Winn-Dixie supermarkets had lead levels that were a concern(担忧) to health officials. The affected bags were found in Florida. But Publix has more than 1,000 stores in Alabama, Florida, Georgia, Sough Carolina and Tennessee. Publix says that all of its bags are under current laws about lead content, but that they have asked the makers of the bags to reduce the lead levels in the product.
The bags with the highest levels of lead had fancy designs and many pictures. Plain reusable bags without decoration were found to contain little lead. Consumers worried about lead levels in reusable bags can change to cloth or string bags. Paper bags are also a good choice, since paper can be recycled(回收).
Since 2007, Publix supermarkets have sold more than 13 million reusable bags. The store says because shoppers have made the change to reusable bags, it has saved more than 1 billion paper and plastics bags.
【小题1】The shopping bags containing high levels of lead ________.

A．have been reported by a newspaper

B．have been stopped by the government

C．have stopped people from using reusable bags

D．have caused serious health damage to customers

【小题2】From Schumer’s words we can learn that ________.

A．reusable bags do little harm to kids’ health

B．people have shown much concern for the reusable bags

C．people will be informed of the facts about the reusable bags

D．people should refuse to buy things from supermarkets

【小题3】 It can be inferred from the text that Publix might believe that the bags they sold are _____.

A．dependable

B．convenient

C．harmful

A．with colorful designs	B．with fancy pictures
C．made of plastic	D．made of paper

文中共有10处语言错误．每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(^)，并在其下面写出谈加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1．每处错误及其修改仅限一词。
2．只允许修改l0处，多者（从第11处起）不计分。
Now paper still come from trees. Unfortunately, we use a lot of paper every day. We mustn’t waste paper, or there will not have any trees leaving on the earth. No trees means no paper. We need 17 trees make one ton of paper. We must start using fewer paper. How can we save paper? Firstly, we can use both sides of paper. We can reuse again envelopes. We can use plastic cups and plates instead of paper one. We can either use handkerchiefs instead of paper tissues. Beside, we can use fewer paper shopping bags and we can reuse these paper bags late.

You’ve bought what you need. The grocery cashier asks, “Will that be paper or plastic? You reply “Plastic, please.”

This seems like a simple question and there are plenty of reasons we choose plastic: easier to carry, lighter than paper bags, possibly less damaging to the environment, less expensive to the shop owners, able to be used as trash bag, and so on. There are different opinions on plastic and paper. Now let’s follow the travels of 3 plastic bags. It begins at the grocery store with the customer’s choice.

Plastic Bag 1: As the waste engineer come by and pick up the trash, the first plastic bag falls out. It sits on a small street for a couple of hours until a car comes along and takes it down to the road. Then a gust of wind blows it across the road, then another car, then another gust of wind finally makes its way to the beach. Water fills the plastic bag and makes it look like a jellyfish. A seal(海豹) swims by, thinking it looks very interesting, and swallowed it. The plastic bag may stay in the seal’s stomach for months, maybe years. You see, our lovely animals have been living thousands of years in a world where everything can be eaten.

Plastic Bag 2: This bag does make its way to landfill(垃圾场). Before they have a chance to cover up the thousands of pounds of daily waste, a strong wind comes up and blows these plastic bags out of the landfill. Once the wind stops, workers will be sent to collect thousands of bags around. But they can’t possibly get them all. So our little bag continues his adventure getting caught in trees, eaten by birds or making its way to our lakes or rivers.

Plastic Bag 3: The last bag also blows away but is caught in a landfill where it sits for many years, as all the trash is wrapped in a big plastic bag, making natural degradation(降解) impossible. Although workers do much work to make sure water and air system won’t be polluted, some do. Guess what, plastic bags are made from petrol, a harmful waste material, which in one way or another makes its way to the environment.

Another problem with putting plastic bags in out trash is that our landfills for most cities may be filled in about 20 years. More importantly, since we are running out of land to build homes, you might have the pleasure of one day living on top of your plastic bags!

One of the best suggestions is not to use a bag at all or bring your own cloth bags. If you must, please choose paper bags, which, though not suggested, can be eaten by animals. And there are more opportunities recycle paper bags. It does take a little extra effort. But please have a thought about the little seal next time you say, “Plastic please.”

1.According to the passage, what is NOT the reason for a customer to choose plastic bags?

A. He can use plastic bags to carry trash later.

B. He finds paper bags heavier than plastic bags.

C. He finds plastic bags more convenient to carry.

D. He can save money for plastic bags are cheaper.

2.The author describes the travel of Plastic Bag 1 to show ______.

A. seals like eating plastic bags around them.

B. seals really have a good stomach.

C. seals are potential victims of plastic bags.

D. seals are not able to differ plastic from food.

3.Wrapped in a big plastic bag, Plastic Bag3_____.

A. still does harm to the environment

B. can hardly be harmful to the environment

C. is much safer than Plastic Bag2

D. will end up being eaten by seals or some fish

4.What will the following part of this passage talk about?

A. Suggestions on reducing harm of plastic bags.

B. Disadvantages of using too many plastic bags.

C. Persuading people into using paper bags.

D. Other potential victims of plastic bags.

5.What is the overall tone of this passage?

A. Excited B. Serious C. Ironical D. Casual

“Why should I care about the environment?” some people ask. There is a very simple reason: We live on the earth, and it is the only place we can live on right now, as we cannot live in space yet. If we treat the earth like a garbage dump, it will become dirty and unlivable. If we treat it well by being eco-conscious, the earth will stay clean and suitable for living, for ourselves and for our children.

What is “being eco-conscious”?

Being eco-conscious means being aware of your actions, and what you do to the environment. For example, you might think, “Using hairspray is great for fixing my hair.” However, if you are eco-conscious, you would ask, “Does this hairspray have CFCs in it? Could I be destroying the earth by using hairspray?”

How can I be eco-conscious?

You can find many simple ways to help the environment in your everyday life.

When you go shopping, bring a bag or a basket with you. Please try not to use plastic bags as much as you can.

You can go to work by bike or on foot if it is not far from your home.

You can put your rubbish into different bags, which makes it convenient for recycling.

You can eat less chewing gum.

You can use your own chopsticks instead of the disposable ones in your company or in restaurants.

You can put batteries in a special box instead of in garbage bins.

You can use the water which has been used for washing vegetables or fruits to clean the floor and the toilet or to water your garden.

You can turn off the decorative lights in your room when watching TV.

You can turn down your air conditioner by one degree, as this will cause a 10% reduction in energy use.

You can use recycled paper. Every ton of recycled office paper saves 380 gallons of oil. You can also use recycled glass instead of glass made from raw materials. This will reduce the related air pollution by 20%, and the related water pollution by 50%.

Please believe that. If you do a little, it will make a big difference.

1.Human beings should care about the environment because _________ .

A．if we make the earth unlivable, we’ll have to live in space

B．it can help our children live better

C．if we don’t, the earth will become a garbage dump

D．it will help to make the world a good living place

2.If your deskmate is an eco-conscious person, he should __________.

A．be aware of the importance of protecting the environment

B．use plastic bags when he buys something

C．know nothing about CFCs

D．turn his air conditioner to a higher degree

3.If you want to help the environment, you should do all the following EXCEPT ________.

A．share a car with your colleagues

B．use paper bags instead of plastic bags

C．use hairspray containing CFCs

D．use recycled glass instead of glass made from raw materials

4.It can be inferred from the passage that _________.

A．it’s very hard for human beings to keep the earth clean and comfortable

B．protecting the environment is the duty of everybody

C．we should protect the environment together, as it’s no use doing it individually

D．it’s very easy to be eco-conscious

5.According to the author, which of the following statements is WRONG?

A．Being eco-conscious means you should know much about the environment.

B．The more we care, the better the environment will be.

C．If each of us just does a little, we can’t make any difference.

D．If we treat the earth badly, we’ll make a lot of trouble for ourselves.

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