Sharks are among the oldest animals on Earth. There are hundreds of kinds of sharks. Most are about two meters long. The dogfish shark, however, is less than twenty centimeters in length. A shark has an extremely good sense of smell. It can find small amounts of matters in water, such as blood, body liquids and chemicals produced by animals. These powerful senses help sharks find their food. Sharks eat fish, other sharks, and plants that live in the ocean.
Sharks grow slowly. About forty percent of all sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies as humans do. Some sharks are not able to reproduce until they are twenty years old. Most reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, over – fishing of sharks is of special danger to the future of the animal.
Sharks are important for the world’s oceans. They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too great. This protects the plants and other forms of life that exist in the oceans.
People hunt sharks for sport, food, medicine and their skin. Experts say the international market for some kinds of sharks has increased because many parts of a shark are valuable.
Collectors pay thousands of dollars for the jaws of a shark. Shark liver oil is a popular source of Vitamin A. The skin of a shark can be used like leather.
In Asia, people enjoy a kind of soup made from shark fins. Experts say a fisherman can earn a lot of money for even one kilogram of shark fins. Sharks are among the oldest animals on Earth, but some sharks are in danger of disappearing from Earth. If too many sharks in one area are killed, that group of sharks may never return to normal population levels.
1.Which of the following words best describes the situation sharks are in?
A. Good. B. Endangered. C. Powerful. D. Expensive.
2.The population of sharks is becoming smaller and smaller as a result of .
A. hunting B. lack of food C. diseases D. their poor ability
3.Sharks eat other fish, .
A. which is a threat to other forms of life in the oceans
B. which is a protection for other forms of life in the oceans
C. which helps prevent diseases from spreading
D. which helps the number of other fish to grow
4.According to the passage, many parts of a shark are valuable EXCEPT ________.
A. its jaws B. its liver C. shark fins D. shark teeth
5.The author thinks that .
A. sharks are valuable to us and we can make full use of them
B. oceans will become safer with fewer sharks swimming around
C. measures should be taken to protect sharks
D. the shark population is increasing slowly
“I would rather die than go home!” said 13-year-old Liang. Liang is a Junior student from Hunan. Earlier this month, people found him in the undercarriage(起落架)of a plane! The plane was flying from Kunming to Chongqing. Liang stayed inside for more than one hour while the plane was high in the sky!
It was very cold, very noisy and the winds were strong. Luckily, Liang survived. But his 12-year-old friend was not so lucky. He fell to his death during the take-off.
So why did Liang do such a dangerous thing? Liang said his parents were divorced (离婚). He felt nobody cared for him. He was very sad so he left home.
Kids face lots of problems these days, don’t they? They have too much homework to finish. They have a lot of exams to worry about. They sometimes fight with friends. Sometimes their parents don’t get on well. It can feel like the end of the world.
How should we deal with these things? Do you just keep it secret and let it be? Do you write it down in your diary? Or do you do what Liang did and leave home? You don’t need to hide in a plane to get away from bad things. It’s very dangerous. Why not try talking to your parents?
1.Liang is a 13-year-old boy from ___________.
A. Chongqing B. Hunan C. Kunming D. Beijing
2.Liang’s friend ___________ during the take-off.
A. died B. went home C. was saved D. lived
3.While Liang was flying, he met with ___________.
A. serious cold B. loud noise C. strong winds D. all of the above
4.Which of the following may NOT be the direct reason for Liang’s dangerous action?
A. His parents were divorced B. He hated his school life.
C. He felt nobody cared for him. D. He was very sad.
5.The easiest way to deal with your problems is ___________.
A. to hide in a plane to get away from them
B. to write them down in your diary
C. to share them with your parents
D. to leave home
阅读下面短文，掌握其大意，然后从各题所给的A、B、C、D四个选项中，选出最佳选项。
A recent survey ___1___ something of home computers used by a group of young people.
We asked thirty young people ___2___ fourteen and eighteen. We asked them how much ___3___ they usually spent on their computers in a week, but we ___4___ most interested in ___5___ they used their computers for.
The usual time spent on a computer in a week was about twelve hours, with ___6___ user about thirty-two hours, and the lowest user only five hours.
All the children said they usually used computers ___7___. Fourteen children told us they did some word-processing(文字处理) ___8___. Only two of them said computers ___9___ their lessons, and eight people told us they kept addresses and phone numbers on their computers or used ___10___ as diaries. Only three people said they were learning to make computer programmes and nobody looked up databases (数据库). None of them used computers for any ___11___ uses.
The ___12___ show that computer use is quite high among 14—18 years old. They also show quite clearly that computers ___13___ by most young people as little more than game machines. The only other great uses are for word-processing and keeping address lists. ___14___, though computers are common in the homes of young people, they have not yet become ___15___ in everyday life.
1.A. shows B. says C. writes D. gives
2.A. among B. between C. from D. about
3.A. hours B. money C. time D./
4.A. is B. was C. are D. were
5.A. what B. why C. how D. whether
6.A. high B. higher C. the higher D. the highest
7.A. to read B. reading C. to play games D. playing games
8.A. at times B. as usual C. in the end D. all the time
9.A. found out B. worked at C. helped with D. looked over
10.A. theirs B. them C. its D. it
11.A. another B. other C. the other D. others
12.A. ways B. questions C. reports D. results
13.A. are seen B. have seen C. will be seen D. see
14.A. More or less B. From now on C. By the way D. It seems to us that
15.A. wonderful B. popular C. useful D. expensive
Susan’s birthday party was __________ success. We sang and danced until it came to _________ end at ten.
A. a; the B. a; an C. /;an D. the; the
Teachers’words and deeds always __________ a great effect _________ their students.
A. have; on B. give; to C. make; in D. take; to
AIDS is said __________ the biggest health challenge to both men and women in that area over the past few years.
A. that it is B. to be C. that it has been D. to have been
