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We’re surrounded by chemistry in everyday life. Sometimes it is easy to see, like when your science teacher does a big experiment in class. At other times, it can be pretty hard to see everyday chemistry at work, but nearly everything you touch or use has some element of chemistry in it.

Something as simple as toothpaste contains at least three chemicals, if not more. It is the mixture of them and its chemical reaction that keeps your teeth clean. Other things you use every day are created by chemistry, such as hair products, shampoo and soap. Adding detergent (洗滌劑) to water involves chemistry. Without chemistry, we would never have known that we need soap to get the oil out of clothes or skin. Chemistry not only helps us make products for use, but it also helps us understand the world around us. Chemistry helps us understand what the ozone layer (臭氧層) is and how it protects us. Chemistry also gives us sunscreen to protect us from the sun. Thanks to chemistry, we know bleach (漂白劑) can’t be mixed with vinegar(醋), because it can produce poisonous gas.Without chemistry, we wouldn’t have fireworks displays on important days.

Chemistry plays a big role in food preparation. Cooking food causes it to go through a chemical change. That is why cooked food often tastes different from raw food. Baking is a great example of chemistry. Too much or too little of any ingredient（成分，尤指烹飪） makes a difference to the result of baking, for example, the dough (面團) won’t rise or the cake will be flat.

Chemistry isn’t something that just lives in a lab; it’s something that you meet hundreds of times every day. Knowing how chemistry works will give you a greater understanding of the science behind some of the simplest-looking things.

1.What’s the main idea of Paragraph 1?

A．Chemistry is easy to see around us.

B．Sometimes chemistry is hard to see around us.

C．How a science teacher does a big experiment.

D．Few things in everyday life contain chemistry.

2.The following actions are about chemistry EXCEPT _____.

A．cleaning teeth with toothpaste

B．washing hair with hair products

C．using soap to get the oil out of clothes

D．washing your face with water

3.The underlined word “poisonous” in Paragraph 3 means _____.

A．harmful           B．healthy           C．fresh             D．pleasant

4.Which one is TRUE according to Paragraph 4?

A．One can’t find chemistry when cooking food.

B．Chemistry plays an important part in food mak-ing.

C．That dough rises is nothing to do with chemistry.

D．A flat cake is the result of too many ingredients.

5.Which of the following would be the best title for the text?

A．Chemistry Around the House

B．Chemistry in Science

C．Chemistry for Dinner

D．Chemistry in everyday life

根據(jù)短文內(nèi)容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。

How to keep healthy and be happy

 1. Who wouldn’t want to know how to be joyful and enjoy good health?

 2. Try to follow the food pyramid(金字塔). Eat a lot of fresh fruits or vegetables, some whole grains and fiber, a little bit of dairy, a little bit of meat, and very little sugar and fat.

 3. To exercise you can run, do sit-ups, push-ups, etc., lift weights, walk around your neighborhood.

 4. It is best to get at least seven hours of sleep a day because lack of sleep can harm your health. To form a regular sleep habit, go to bed at the same time each night and wake up at the same time each morning. It may seem hard at first, but it will get easier after you’ve done it for a while.

Keep yourself busy. This is good because it prevents you from having bad habits, such as smoking and taking drugs. It is also important to keep busy with positive tasks.  5. To keep yourself busy you can work around the house, spend time with your pets. Write in a journal, do a sport, or spend time doing a hobby you enjoy.

Remember that nothing is worth sacrificing(犧牲)health and happiness for, so avoid anything that destroys them. Do not do anything harmful to yourself such as doing drugs, smoking, or hanging around and being influenced by negative people.

A．Be social and have friends.

B．Good health and happiness are important goals in life.

C．Eat balanced meals.

D．Worrying is harmful, and work is good for the mind as well as the body.

E. Take some exercise regularly.

F. Make sure you get eight hours of sleep daily.

G. Form regular sleep habits.

假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處。錯誤涉及一個單詞的增加、刪除或修改。

增加：在缺詞處加一個漏字符號（Ù），并在其下面寫出該加的詞。

刪除：把多余的詞用斜線( \ )劃掉。

修改：在錯的詞下面劃一橫線，并在該詞下面寫出修改后的詞。

注意：

1. 每處錯誤及修改均限一詞；

2. 只允許修改10處，多者（從11處起）不計分。        

The winter holiday are coming, that makes me excited. I have been looking forward at relaxing myself. I'd like to go skating, climb mountains and see several movie. I think I can play the basketball with my classmates. How a wonderful time I'll have during the winter holiday! However, my parents think different. They don't want me go out. They are afraid I'll be knock down by a truck or fight with others. Besides, they are afraid I will lose my way. I hate being treated like a bird in a cage. To get more freedom, I will try to persuade him.

---Whose advice do you think I should take?

--- ________ .

A．You speak         B．That's it           C．You got it          D．It's up to you

There are many ______ TV programs about the Beijing Olympic Games. You can choose any you like and enjoy it.

A．living             B．a(chǎn)live             C．live              D．lively

Tom made _____ great progress last semester and as _____ result, he was praised by the teacher.

A．a(chǎn); a              B．a(chǎn); /              C．/; /              D．/; a

— Mr White has been working all the morning with no rest.

— He is a(n) ________ man. He never looks tired.

A．energetic         B．powerful          C．lovely            D．a(chǎn)ttractive

Berners-Lee ________ the idea of the World Wide Web in 1989 while working in Switzerland.

A．caught up with                         B．came up with

C．looked forward to                       D．put off

---When _______for Guangzhou?

---Next Monday evening.

A．a(chǎn)re you leaving                         B．were you leaving

C．you are leaving                         D．you were leaving

The number of people invited ____ fifty, but a number of them ____ absent for different reasons.

A．were , was         B．was , was          C．was , were         D．were , were