7. The reason why she adapted to the new situations quickly is that she has a (n)        (易适应的) attitude.

6. I must ask you to a       me to the police station.

5. Some creatures were better at surviving and        (再生) them- selves than others.

4. The headmaster thought highly of such v       as hard-working,honesty,courage and truthfulness shown by many students in our school.

3. The change is        (有益的) in some ways but not in others.

2. The water is so        (透明的) that we can see the fishes swimming.

1. With so many teenagers being addicted to the Internet,more and more problems have a        .

 Scientists inCanadasay big ocean fish have almost disappeared from the world since the start of industrial fishing in the 1950s. The scientists found that the population of large fish like tuna,swordfish and cod has dropped by ninety per cent in the past fifty years. The study took ten years. The researchers gathered records from fishing businesses and governments around the world. The magazine Nature pub?lished the findings.

  The scientists say the common method called longline fishing is especially damaging to populations of large fish. This method involves many fishing lines connected to one boat. These wires can be close to one hundred kilometres long. They hold thousands of sharp metal hooks to catch fish.

  Longline fishing is especially common in the Japanese fishing industry. Records showed that Japanese boats used to catch about ten fish every one hundred hooks. The study says longline fishing boats now might catch one fish per hundred hooks.

  The scientists say industrial fishing can destroy groups of fish much faster than in the past. The study suggests that whole populations can disappear al?most completely from new fishing areas within ten to fifteen years.  

  Ransom Myers of Dalhousie University in Nova Scotia led the study with Boris Worm of Dalhousie and the University of Kiel inGermany. Mr Worm says the destruction could lead to a complete reorganization of ocean life sys?tems. Mr Myers says the decreased number of large fish is not the only worry. He says even populations that are able to reproduce do not get the chance to live long enough to grow as big as their ancestors (祖先) .He says not only are there fewer big fish,but also they are smaller than those of the past.

  American government scientists say even with the best efforts to protect fish populations,decreases are to be expected.

1. Where is the passage probably taken from?

   A. A storybook.

   B. A business magazine.

   C. An environment report.

   D. An economic survey.

2. Big fish have gradually been disappearing especially because        .

   A. longline fishing method is used

   B. sea water is getting polluted

   C. mankind destroys the environment

   D. governments don't make the best efforts

3. Which of the following shows the fact that populations of large fish have dropped?

   A. Today's "large" fish are smaller than those of the past.

   B. Longline boats now might catch fewer fish every one hundred hooks.

   C. Fish even able to reproduce don't have the chance to live longer.

   D. Japanese boats could catch about ten fish every one hundred hooks.

4. What can be the best title?

   A. Canadian scientists have made discoveries

   B. Japanese fishing industry

   C. Losses of big fish

   D. Modern fishing methods

   Harvard researchers have created a tough,low-cost,biodegradable (可生物降解的) material inspired by insects' hard outer shells. The material's in?ventors say it has a number of possible uses and someday could provide a more environmentally friendly alternative to plastic. The material,made from shrimp (奸) shells and proteins produced from silk,is called "shrilk". It is thin,clear,flexible and strong.

  A major benefit of the material is its biodegradability. Plastic's toughness and flexibility represented a revolution in materials science during the 1950s and 1960s. Decades later,however,plastic's very durability (耐用性) is raising questions about how appropriate it is for one-time products such as plastic bags,or short-lived consumer goods,used in the home for a few years and then cast into a landfill where they will degrade for centuries. What is the point of making something that lasts 1,000 years?

  Shrilk not only will degrade in a landfill,but its basic components are used as fertlilizer (肥料) ，and so will enrich the soil.

  "Shrilk has great potential," the inventors said. Materials from which it is made are plentiful in nature,found in everything ranging from shrimp shells,insect bodies to living plants. That makes shrilk low-cost,and its mass production possible should it be used for products demanding a lot of material.

  Work on shrilk is continuing in the lab. The inventors said the material becomes flexible when wet,so they're exploring ways to use it in wet environ?ments. They're also developing simpler production processes,which could be used for non-medical products,like for computer cases and other products in?side the home. They're even exploring combining it with other materials,like carbon fibers,to give it new properties.

1. Paragraph 1 of the passage is mainly about shrilk's        .

   A. remarkable design   B. interesting name

   C. major features   D. basic elements

2. What has become a concern about plastic?

   A. Using it properly.

   B. Producing it cheaply.

   C. Developing its properties quickly.

   D. Evaluating its contributions fairly.

3. According to the inventors,shrilk has great potential partly because       .

   A. it can help plastic degrade

   B. it can be found in living things

   C. its mass production has been realized

   D. its raw materials are abundant in nature

4. What are the inventors doing in the lab?

   A. Replacing carbon fibers with shrilk.

   B. Testing shrilk's use in wet conditions.

   C. Making shrilk out of used household goods.

   D. Improving shrilk's flexibility for medical purposes.

5. Which of the following can be the best title for the passage?

   A. Recent progress in environmental protection

   B. Benefits of insects in scientific research

   C. The harm of one-time products

   D. A possible alternative to plastic

  Do you love your mother? Do you think your mother is the greatest per?son in the world?

  My mother is a diligent and kind woman. She is very busy from morning till night. As a teacher,she works hard. 1        Both my brother and I love her dearly as she loves us.

  My mother has been teaching maths at a middle school in my hometown. She goes to work early in the morning and does not return home until late in the afternoon. 2        She treats them with patience and teaches them well. For her excellent quality and very good teaching results,she has been elected as a model teacher several times.

  3        Every day,when she comes back home from work,she sets about doing housework,sweeping the living room and bedrooms or cleaning the fur?niture,and putting everything in good order. She seems to be busy all the time. But she looks as cheerful and happy as ever. Mother never buys expen?sive dresses for herself,but she often buys some inexpensive but high-quality clothes for us. 4        She just eats a simple meal outside when she is too busy to cook herself. She lives a busy yet simple life,without any complaints.

Often she says to us, "Work while you work,and play while you play.” What a piece of good advice this is! 5        This advice of hers will always serve as a guide to my behaviour. My mother is great indeed,and I always feel proud of her.

   A. She enjoys listening to classic music.

   B. As a mother,she takes good care of us and gives us every comfort.

   C. She loves her students and cares for them.

   D. She never goes to expensive restaurants to enjoy meals.

   E.My mother is hard-working and never wastes money.

   F.I never forget the advice and always bear it in my mind.

   G.Can you tell us something about your mother?