阅读理解。 Do you know about Dolly, a famous sheep? She was created by clonin
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But what is used in cloning? It’s DNA. There is DNA in most living things, including human beings. Your DNA is the same in every part of your body. For example, your fingernails have the same DNA as
your hair. You have your own DNA, which is similar to your parents’ , but not exactly the same. However, Dolly’s DNA is exactly the same as that of the sheep she was cloned from.
No doubt cloning can help save those animals in danger. And it can also benefit human beings. The cloning technology has been used in human organs. With its help, scientists are able to explore more ways
to treat many serious diseases such as heart disease, AIDs and cancer. However, cloning could be used in some ways to harm society. All governments should make laws to make sure it can be used properly.
B. More than fifty years ago, in Scotland.
C. More than ten years ago, in Scotland.
D. More than fifty years ago, in China.
B. mice
C. rabbits
D. giraffe
nt. B. Your our fingernails don’t have the same DNA as your hair.
C. Your DNA isn’t exactly the same as your parents.
D. Cloning won’t be used in any ways to harm society.
B. has been used in human organs
C. has been used properly
D. is useless
B. Society
C. DNA
D.Cloning
答案
举一反三
English speakers are always creating new words, and we are often able to know w 1 most words
come from.
Sometimes, h 2 , no one may really know where a word comes from. Did you ever think about
w 3 hamburgers are called hamburgers, especially when they are not made with ham? About a
hundred years ago, some men went to America f 4 Europe. They came from a big city in Germany
called Hamburg. They did not speak good English, but they ate good food. When some Americans saw
them e 5 round pieces of beef, they asked the Germans what it was. The Germans did not understand
the question and answered, 66We come from Hamburg. " One of these Americans owned a restaurant,
and had an idea.
He cooked some round pieces of beef like those w 6 the men from Hamburg ate. Then he put
each between two pieces of bread and started selling them. Such bread came to be called "hamburgers".
Today 6"hamburgers" are sold in many countries a 7 the world.
Whether this story is true or not, it certainly is interesting. Knowing why any word has a certain
meaning is i 8 , too.
1. 2. 3. 4. 5. 6. 7. 8.
is true that men have invented a lot of useful things. But scientists and archaeologists now agree that women invented one very important thing. It has changed history. They invented agriculture. Before the invention
of agriculture men were hunters. They went out every day. Sometimes they killed animals and sometimes
animals killed them. Life was difficult and dangerous. Women had to go out every day, too. They collected roots, fruit and grass. Then, one day, more than 100,000 years ago, a woman dropped some grass seeds. They grew and the first wheat was born. The idea grew, too. Women planted fruit trees. Then they could
stay at home and look after the children and the animals. Women like baby animals. Archaeologists think
that women kept the first domestic animals: dogs, cows sheep and goats. That idea grew, too. Then their
husbands did not have to go hunting for meat.They stayed at home.They built villages and cities. Civilization began.
1. Agriculture made it for mankind to begin civilization.
A. dangerous
B. possible
C. popular
D. interesting
2. Villages and cities appeared the inventior; of agriculture.
A. after
B. before
C. for
D. about
3. built villages and cities.
A. Scientists
B. Women
C. Men
D. The children
4. We think invented important things.
A. both men and women
B. men
C. scientists
D. women
5. Men didn"t go out for meat with the help of .
A. the children
B. the animals
C. scientists
D. their wives
| one, everyone, usual, for, hundred, fly, look, understand, study,be |
| 根据上下文及首字母提示，补全单词，完成短文。 |
| Children"s schooling is changing very fast today. In the past, teachers k l children sitting still for hours. They made them memorize d 2 kinds of things. In other w 3 , the children had to go on repeating things until they knew "by heart". Today, many teachers want to know if it is p 4 to make children learn at all. They say you can o 5 help them learn. They say you must let children learn and find out things for t 6 . But for these children, school is a kind of prison. They are there only because their p 7 make them go. They get out of the classroom as soon as the teacher lets them 1 8 . Many of them want to find work, but the law will not let them work until they reach a certain a 9 . And so, they have to stay in school. Often they do not learn a 10 at all and hate every moment. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. |
| 阅读理解. The dinosaurs once lived happily on the earth. But 65 million years ago, they suddenly died out. What happened to them? Scientists think that a change in temperature may be to blame. They have come up with lots of ideas to explain the end of the dinosaurs. The most famous one is the minor planet (小行星) idea. Let"s go back to that day 65 million years ago to see what happened. Everything was OK before a large minor planet suddenly hit the earth. What a terrible hit! It caused big fires, storms, acid rain (酸雨), and even earthquakes and volcano eruptions. The hit produced a lot of dust, which flew up into the air and blocked the sun for months. The earth became very cold without sunlight. The plants died first. Then the grass eating animals died of hunger. Then the meat eating animals could not find food, either. They began to eat each other, but after a while they died out, too. The dinosaurs, either plant-eaters or meat-eaters, did not live through the disaster. What a sad story ! In April, a British scientist thought of a new idea about the death of the dinosaurs. He thinks that after the minor planet hit the earth, the temperature change left more dinosaur boys than girls! Without enough female dinosaurs to hatch the eggs, the dinosaur population became smaller and smaller. |
| 1. may be the main reason for the dinosaurs dying out according to scientists. A. Big fires B. Earthquakes C. Acid rain D. Temperature change 2. The passage mentioned ideas that the scientists came up with about the end of the dinosaurs. A. two B. three C. four D. five 3. The underlined expression "volcano eruptions" probably is . A.the name of a minor plane B. one kind of dinosaurs C. one kind of disaster D. the name of an earthquake 4. The earth became cold because . A. the sun refused to rise B. the dust kept the sunlight away C. there"s too much rain D. there are too many dinosaurs 5. This passage may be found in . A. a science fiction B. a story book C. a dictionary D. a science magazine |