Plastic is everywhere because plastic is an extremely useful material.It is cheap, strong and lightweight.What’s more, it can take on nearly any form or shape, from soft and stretchy (有弹性的) to hard and glasslike.

Plastic, however, is far from perfect.It may even be bad for us.Studies now suggest that poisonous chemicals can get out of some types of plastic, get into our bodies, and cause a variety of health problems, including cancer, birth defects and attention deficit hyperactivity disorder (注意缺陷障碍).

Two types of chemicals in particular have raised special concern lately.They are called phthalates (邻苯二甲酸盐) and Bisphenol-A (二酚基丙烷), BPA for short. Not all plastic products contain them.But the ones that do are surrounded by controversy (争议).That’s because experts disagree on how dangerous these chemicals are.

Plastic is a single word, but plastic isn’t just one thing.What all plastics share in common are plasticizers -- special chemicals that allow the material to be changed into nearly any shape or texture.Plasticizers (塑化剂) are added to plastic during the manufacturing process.

Phthalates and BPA are two types of plasticizers that work in different ways.Phthalates add softness to things like shampoo bottles, raincoats and rubber.They are also used in perfumes and makeup.BPA, on the other hand, gives a hard, clear, almost glasslike feel to products such as infant bottles.BPA also appears in food and soda cans, DVDs and other unexpected places.

How do these chemicals get into us? When plastic is heated in the microwave or dishwasher, chewed on or scratched, the chemicals can seep (渗透) out of the plastic.Even though we can’t see them, we eat them, drink them and breathe them in.

Scientists and parents are especially worried about young children, who tend to chew on everything, including plastic.Dozens of countries, including the European Union, Japan, Canada and Mexico have already banned phthalates from products made for children younger than three.California and Washington have done the same.And a number of other states are considering similar rules.As for BPA, Canada became the first country to ban the chemical from baby bottles.A dozen states are considering it.

1.What can we know about the plastic from the first paragraph?

A.Its characters and effects. B.Its wide use and bad points.

C.Its importance and chemicals. D.Its popularity and advantages.

2.Which of the following products contains BPA?

A.A soft plastic cup. B.A pencil eraser.

C.A baby milk bottle. D.A new perfume.

3.Phthalates and BPA can get into us __________.

A.through mouth or nose

B.through blood transfusion

C.by feeling plastic products

D.by heating in the microwave

4.What is the passage mainly about?

A.A new ban on plastic products.

B.Problems caused by the plastic.

C.Good points of the plastic.

D.The use of plasticizers.

All of us go through some difficult times as we approach teenage years. It’s the age when we have to deal with the most in our life. This transition (过渡) from childhood to adulthood is for some, but rough for others. The most important thing about being a teenager is . When we are teenagers, we would get blamed or even punished for anything wrong we do. Unlike before when we were small kids, even if we made a big trouble, we didn’t need to pay anything for it.

It’s all not so about being a teenager though. We don’t have to have our take us to somewhere we want to go or we couldn’t go before. We can have with friends or even alone, which we couldn’t have because we were too to know what pleasure is! It’s a very enjoyable time of life. During this age, we are old enough to what is good for us, and make decisions by ourselves without others.

But like the saying goes “All good things must come to an end, but all bad things can continue .” During this period, we are having much for our studies. If we don’t pass, we won’t get jobs, and things will take a turn for the . With the present world economy in , we have to do really, really well in our for a job. Adults say that their is the hardest part of life. But I think the transition from a kid to an adult is much than being already an adult. What we do in our teenage years will what we become and how we lead our life in the future.

In conclusion, it is quite that parents put much pressure on an already stressed out teenager. If they realized that, living condition for teenagers would be much better. for the teens ourselves we should get to know what is best for us. What’s more, we should understand the right of life we choose at this age can make us happy for the rest of our existence.

1.A. chances B. changes C. feelings D. expectations

2.A. smooth B. practical C. demanding D. necessary

3.A. knowledge B. independence C. confidence D. responsibility

4.A. easy B. strange C. bad D. interesting

5.A. guides B. partners C. parents D. friends

6.A. fun B. trouble C. relation D. business

7.A. proud B. young C. smart D. mature

8.A. predict B. remember C. imagine D. understand

9.A. guiding B. helping C. inviting D. consulting

10.A. occasionally B. briefly C. forever D. increasingly

11.A. pressure B. passion C. motivation D. panic

12.A. better B. worse C. fewer D. more

13.A. decline B. hope C. increase D. debt

14.A. contribution B. education C. application D. qualification

15.A. promotion B. work C. experience D. age

16.A. harder B. happier C. easier D. lighter

17.A. reflect B. confirm C. determine D. identify

18.A. vital B. urgent C. common D. unnecessary

19.A. Thus B. Although C. But D. Because

20.A. experience B. way C. condition D. power

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