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 (洗涤剂) 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 (臭氧层) is and how it protects us.
Chemistry also gives us sunscreen to protect us from the sun. Thanks to chemistry, we know bleach (漂白剂) can’t be mixed with vinegar, 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 makes a difference to the result of baking, for example, the dough (面团) 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 making.
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
The English language is the result of the invasion(入侵) of the island of Britain over many hundreds of years. The first invasions were by a people called Angles about 1, 500 years ago. The Angles were a German tribe who crossed the English Channel(英吉利海峡). Later two more groups crossed to Britain. They were the Saxons and the Jutes. Through many years, the Saxons, Angles and the Jutes mixed their different languages. The result is what is called Anglo-Saxon or old English.
The next great invasion of Britain was done by Vikings about 1, 100 years ago. Many English words used today come from these ancient Vikings.
The next invasion of Britain took place more than 900 years ago, in 1066. History experts call this invasion the Norman Conquest. The Normans were a French-speaking people from Normandy in the north of France. These new rulers(统治者) spoke only French for several hundred years. It was the most important language in the world at that time. It was the language of educated people. But the common people of Britain still spoke old English.
Old English took many words from the Norman French. Some of these include “damage”, “prison”, and “marriage”. The French language used by the Norman rulers greatly changed the way English was spoken 800 years ago. English became what language experts call Middle English. Middle English sounds like Modern English. But it is difficult to understand now. The history of the English language continues as Middle English becomes Modern English, which is spoken today.
1.Who was the first invaders(入侵者) of Britain?
A. The Angles. B. The Saxons.
C. The Jutes. D. The Normans.
2.How many groups of invaders are mentioned in the passage?
A. Three. B. Four.
C. Five. D. Six.
3.Which of the following is TURE about Middle English?
A. It sounds like Old English.
B. It’s quite different from Modern English.
C. Few people understand it now.
D. It stopped developing.
4.During the rule of the Normans, the language people spoke showed their ______.
A. races (种族) B. social positions
C. ability D. names
5.What is mainly discussed in this passage?
A. The historical invasions of Britain.
B. Other languages that have influenced English.
C. The origin (起源) and development of English.
D. Old English and Modern English.
When I was about 12, I had an enemy, a girl who liked to point out my shortcomings(缺点). Week by week her list grew: I was very thin, I wasn’t a good student, I talked too much, I was too proud, and so on. I tried to hear all this as long as I could. At last, I became very angry. I ran to my father with tears in my eyes.
He listened to me quietly, then he asked, “Are the things she says true or not? Janet, didn’t you ever wonder what you’re really like? Well, you now have that girl’s opinion. Go and make a list of everything she said and mark the points that are true. Pay no attention to the other things she said.” I did as he told me. To my great surprise, I discovered that about half the things were true. Some of them I couldn’t change (like being very thin), but a good number I could--and suddenly I wanted to change. For the first time I go to fairly clear picture of myself.
I brought the list back to Daddy. He refused to take it. “That’s just for you,” he said. “You know better than anyone else the truth about yourself. But you have to learn to listen, not just close your ears in anger and feeling hurt. When something said about you is true, you’ll find it will be of help to you. Our world is full of people who think they know your duty. Don’t shut your ears. Listen to them all, but hear the truth and do what you know is the right thing to do.”
Daddy’s advice has returned to me at many important moments. In my life, I’ve never had a better piece of advice.
1.What did the father do after he had heard his daughter’s complaint(抱怨)?
A. He told her not to pay any attention to what her “enemy” had said.
B. He criticized (批评) her and told her to overcome her shortcomings.
C. He told her to write down all that her “enemy” had said about her and pay attention only to the things that were true.
D. He refused to take the list and have a look at it.
2.What does “Week by week her list grew” mean?
A. Week by week she discovered more shortcomings of mine and pointed them out to me.
B. She had made a list of my shortcomings and she kept on adding new ones to it so that it was growing longer and longer.
C. I was having more and more shortcomings as time went on.
D. Week by week, my shortcomings grew more serious.
3.Why did her father listen to her quietly?
A. Because he believed that what her daughter’s “enemy ”said was mostly true.
B. Because he had been so angry with his daughter’s shortcomings that he wanted to show this by keeping silent for a while.
C. Because he knew that his daughter would not listen to him at that moment.
D. Because he wasn’t quite sure which girl was telling the truth.
4.How did the author feel after she did as her father told her?
A. Angry. B. Disappointed.
C. Bored. D. Thankful.
5.Which do you think would be the best title for this passage?
A. Not an Enemy, but the Best Friend
B. The Best Advice I’ve Ever Had
C. My Father
D. My Childhood
My most memorable experience was when my father and I got lost in a forest. We were camping in Sequoia National Park for a long weekend. As as we got there, my family and I our tents and by then it was starting to get .
My dad started up a small fire and that there would not be enough wood for the , so he decided to go for some firewood. I wouldn’t let my father go off his own, so I followed in his direction. I up with him and we went off into the forest for some firewood.
Soon we got off track and realized we got . With nothing but a flashlight(手电筒), we started back. We felt like foreigners, not familiar at all with the . My dad stopped to figure out (琢磨) what we could do, I just sat down on a fallen tree. After a couple of minutes of rest, I thought it would be OK to .
All of a I felt my dad’s arm me up and he placed my head on his . I felt as safe as a bear, protecting over its child. My dad walked and walked he found a trail(小路), and one way or another he found our campsite. My mother was very , almost crying about where we were. , I think that it was a good thing to be lost for a little while because I got to spend good quality time with my dad.
1.A. long B. soon C. far D. well
2.A. put up B. picked up C. took up D. gave up
3.A. black B. clean C. clear D. dark
4.A. realized B. promised C. recognized D. admitted
5.A. day B. afternoon C. night D. morning
6.A. on B. with C. by D. at
7.A. came B. caught C. put D. got
8.A. asking B. calling C. looking D. sending
9.A. paid B. lost C. dressed D. changed
10.A. returning B. looking C. walking D. arriving
11.A. environment B. language C. difference D. expression
12.A. exactly B. frequently C. entirely D. gradually
13.A. but B. yet C. so D. because
14.A. play B. walk C. sleep D. seat
15.A. moment B. minute C. flash D. sudden
16.A. throw B. set C. draw D. pick
17.A. head B. leg C. shoulder D. arm
18.A. unless B. until C. while D. since
19.A. worried B. excited C. calm D. eager
20.A. Therefore B. Otherwise C. Besides D. However
At the meeting they discussed three different _________ to the study of mathematics.
A. approaches B. means
C. methods D. ways
Look! Here come the dark clouds. It______ rain.
A. will B. would
C. is going to D. was going to
