If these trousers are too short, buy a longer_______.
A. one       B. pair        C. ones

Big ocean(海洋)fish have almost disappeared from the world since the start of business fishing in the 1950’s．The scientists found that the number of large fish has dropped by 90 percent in the past fifty years．The study took ten years．The researchers collected records from fishing business and governments around the world．The magazine Nature published the findings．

    The scientists say the common way called longline fishing is especially harmful to large fish．This way includes many fishing lines that are connected to one boat．If these lines are joined together，they can reach one hundred kilometers．They hold thousands of sharp metal hooks to catch fish．Longline fishing is especially common in the Japanese fishing industry．Records show that Japanese boats used to catch about ten fish for every hundred hooks．The study says longline fishing boats now might catch one fish per hundred hooks．

    The scientists say business fishing can destroy groups of fish much faster than in the past．The study suggests that large fish can disappear almost completely from new fishing areas within ten to fifteen years．Ocean life system could be destroyed．

    It’s not the only worry that the number of large fish is becoming smaller and smaller．What’s worse．they are smaller in size than their ancestors(祖先)．

1.The magazine Nature published the findings．The word“published”here means________．

    A．发表          B．发现         C．研究        D．调查

2.The number of big ocean fish has become smaller because_________．

    A．the oceans are polluted

    B．the ways of fishing go into practice

    C．the scientists pay little attention to them

    D．Japanese fishing boats catch one fish per hundred hooks

3.What do you think of the business fishing?

    A．It should be encouraged．

    B．It can balance ocean life system．

    C．It needn’t be cared about．

    D．It may bring harm to ocean fish．

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

    A．Longline fishing

    B．Japanese fishing industry

    C．Modem fishing ways

D．Worrying situation of big ocean fish

London used to be “foggy” for the same reason that cities like Beijing or Chongqing are “foggy” today. The “fog” was in fact smog, a mixture of smoke and fog. In other words, it was made by air pollution. In London, some of this pollution came from factories, but much of it came from the coal(煤)that people burnt in their houses to keep warm during the winter. By the 1950s, London’s smog problem had become so bad that the government decided to do something to clean the air. A new law was made and nobody could burn coal in any British city. Within a few years, the air became much cleaner. There were no more “pea-soupers”.
Many Chinese cities now face the same sort of problem with air pollution that London faced 40 or 50 years ago. However, this problem is more difficult for Chinese cities to solve. One reason is that more of the pollution comes from the factories, rather than from coal burnt in people’s houses. If these factories were closed, this would harm the economy and lots of people would lose their jobs. Another reason is that changing from coal to cleaner fuel(燃料), like gas, is quite expensive.
However, the air in many Chinese cities is becoming cleaner and cleaner, as the government and people pay more and more attention to cutting down pollution. As a result, there are fewer “pea-soupers” in Beijing than there used to be.
根据短文内容，选择最佳答案，并在答题卡上按要求作答。
【小题1】What was the main reason for air pollution in London?