Air is a colorless, tasteless and invisible（看不见的）gas that is around us. An “empty” drinking glass and an “empty” room, in fact, are not really empty. Each is filled with air. When the glass is filled with water, the water pushes the air out of the glass.

Air, as a gas, has no definite shape, but because it is matter, it takes up space and it has weight. It is easy to prove that air is something that takes up space. Stuff a piece of dry cloth（布）into the bottom of a glass so that it will not fall out when the glass is turned upside down. Push the upside down glass, holding straight up and down, into a jar of water till the glass is completely covered. When the glass is taken out of the water, the cloth is still dry. The air inside the glass shows that it takes up space and keeps the water from coming in.

1.Since air is matter, it has ________.

A．room , and weight as well                 B．both room and shape

C．either room or weight                    D．neither shape nor weight

2.The word “Stuff” means ______ in Chinese.

A．撕               B．盖               C．取掉             D．塞

3.The writer tells that the experiment（实验）___________.

A．is carried out in the space                 B．must be done in the lab

C．is made in the room                     D．can only be done in the open air

China is the home of tea,  36 has more than 4,000 years of history. People in China drink tea daily.  37  the three major drinks ----tea, coffee and cocoa, tea is drunk by   38 people in the world. Tea from China, along   39 silk and porcelain, began to be known by the world over a thousand years ago and has been an important Chinese export  40  .

Tea leaves  41  mainly in the area south of the Yangtze River, in the provinces of Zhejiang, Jiangxi and Fujian, because of the mild  42  and rich soil there. Longjing, Wulong, Pu’er and Tieguanyin are all 43  kinds of tea.

Over the past centuries, Chinese people  44  their unique tea culture, which includes tea planting, tea-leaf picking, tea making, tea drinking and so on. Tea is   45  a popular topic which is often mentioned in dances, songs, poems and novels.

Everyone wants to have healthy teeth. When you laugh, you will   1    your mouth and show your teeth. The healthier your teeth are, the happier you feel. Why is that?

It's   2    your teeth are important in many ways. Take care of them, and they'll help to take care of you. Strong,   3    teeth help you grow. They also help you speak clearly. You can take pate of your teeth by doing like these:

Brush your teeth   4    a day, after getting up and before bedtime. And you brush all of your teeth, not just the front ones. Spend some time   5    the teeth along the sides and in the back. Take your time while brushing. Spend at least three   6     each time you brush. Be sure your toothbrush is soft. Ask your parents to help you get a new toothbrush   7    three months. Clean between your teeth with dental floss(牙线).It feels strange when you do it   8    first, but soon you'll get used to doing it. Brushing   9    your teeth healthy. You also need to care about what you eat and drink. Eat    10  fruits and vegetables and drink water instead of drinks.

Do you want to have white and healthy teeth? Please brush your teeth!

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--- Tea or coffee?

---_______. Just a piece of bread. I feel a little hungry.

A．Neither           B．Both             C．Either            D．All

My sister can’t cook, I can’t, ________ .

A．too              B．also              C．either            D．neither