When people talk about air pollution, they are usually thinking about outdoor air  1 . But do you know that there is    2  air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses have   3   to do with polluted indoor air.
A lot of pollution comes from indoor activities   4   smoking and cooking. As most people    5   about 80-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.
Air pollution influences our health   6 . When the air is polluted, not only young children and old people suffer from it,   7  people with health problems suffer as well. Indoor air pollution can   8  people's eyes, noses and throats. Air pollution, both indoor and outdoor, can also lead to lung cancer（肺癌）and heart disease! In the great London fog in 1952, 4,000 people died in a few days   9  the pollution!   10  is said that half a million young children and women die each year in India because of indoor air pollution!

A．talk about

B．chat with

C．chat for

D．speak

Do you often talk with your parents? Here is some advice on how to talk with them.
Try to start your talk with something fun. This will make talking easier. For example, ask them questions about their day. How’s work? They love this.
Make it clear what you want to tell your parents. If they have an opinion, let them finish and don’t stop their talking. Ask them to do the same for you.
Show them respect (尊重) by listening to them carefully. Look them in the eye (直视).
Be honest. Honesty builds trust (信任). Life is good when your parents trust you.
If your parents don’t understand, that’s OK. It doesn’t mean they don’t love you. Sometimes you have to explain the things to them again.
When you finish the talk, thank them for listening. Say something like “thanks”. It will let them know this is important to you, and make them want to do it more often.
【小题1】If you want to start the talk easily, you should say something        at the beginning.

Today we’ll talk about the history of blue jeans. For many people, blue jeans stand for (代表) American culture.

The history of blue jeans usually began with a man named Levi Strauss. He did not invent jeans. But he is the first person to produce and sell them in large numbers. Levi Strauss was born in Germany. In 1847, he and his family moved to the United States. He opened a small store and sold jeans. These pants were especially useful for miners (矿工) in California. They needed strong clothing. Levi Strauss worked with Jacob Davis, who had invented a step for making rivets (铆钉) for jeans. They helped make the blue jeans stronger.

In 1873, Strauss and Davis received a patent (专利) to own this invention. Nineteenth century workers would probably be surprised to know that their pants would one day become fashions. Today, jeans are worn by people of all ages. Jeans come in many colors other than blue and in many styles and prices. Fashion designers even create very costly jeans. 

Writer James published a book called Jeans: A Cultural History of an American Icon (偶像). In the book, he says jeans serve as a sign for two American values, creativity and rebellion (叛逆).

1. Why did Jacob use rivets for jeans? 

2.Which of the following is WRONG about blue jeans? 

3.The two American values are rebellion and _____________.    

4.What’s the main idea of the passage?

Today we’ll talk about the history of blue jeans. For many people, blue jeans stand for (代表) American culture.

The history of blue jeans usually began with a man named Levi Strauss. He did not invent jeans. But he is the first person to produce and sell them in large numbers. Levi Strauss was born in Germany. In 1847, he and his family moved to the United States. He opened a small store and sold jeans. These pants were especially useful for miners (矿工) in California. They needed strong clothing. Levi Strauss worked with Jacob Davis, who had invented a step for making rivets (铆钉) for jeans. They helped make the blue jeans stronger.

In 1873, Strauss and Davis received a patent (专利) to own this invention. Nineteenth century workers would probably be surprised to know that their pants would one day become fashions. Today, jeans are worn by people of all ages. Jeans come in many colors other than blue and in many styles and prices. Fashion designers even create very costly jeans. 

Writer James published a book called Jeans: A Cultural History of an American Icon (偶像). In the book, he says jeans serve as a sign for two American values, creativity and rebellion (叛逆).

1. Why did Jacob use rivets for jeans? 

2.Which of the following is WRONG about blue jeans? 

3.The two American values are rebellion and _____________.    

4.What’s the main idea of the passage?