More than 20countries have found cases of the new H1N1 influenza virus (病毒)。In all around 1,500 cases and 30 deaths have been true, But most have been reported in Mexico and, to a much lesser extent, the United States. The virus was discovered in Mexico in the middle of March.

On Tuesday, federal officials in the United States advised school not to close any more when they have cases. Then new health secretary , Kathleen Sebelius, said the virus does not seem to be as severe (严重的) as once thought.

 The Word Health Organization will not declare an influenza pandemic (流行全世界的) unless a virus becomes widespread in at least two areas of the world. The W. H. O. is advising people to wash their hands often with soap and water. And it says there is no danger of infection (传染) from eating well – cooked meat form pigs. The danger of H1N1 may have eased (减轻) in recent days. But public health officials point out that flu viruses can return more aggressively (攻击性地)after a few months. That happened with the so-called Spanish flu of 1918 which killed millions worldwide.

1.Which country has most of the cases of the new H1N1 influenza virus?

     A.The United States           B.Mexico

     C.We don’t know             D.One of the 20countries

2.Why were schools in the United States advised not to close any more when they have cases?

A.The virus seems to be as severe as once thought.

B.The virus seems to be more severe than once thought

C.The virus doesn’t seem to be less severe than once thought

D.The virus seems to be less severe than once thought.

3.When will the World Health Organization declare an influenza pandemic?

A.A virus becomes widespread in least three of the world

B.A virus becomes widespread in at least one area of the world

C.A virus becomes widespread in more than one area of the world

D.A virus becomes widespread in more than two areas of the world.

4.Is there danger of infection from eating well-cooked meat from pigs?

A.No, we can’t eat well-cooked meat from pigs.

B.No, there isn’t. We can eat well-cooked meat from pigs.

C.Yes, there is. We can’t eat well-cooked meat from pigs

D.Yes, there is. We can eat well –cooked meat from pigs.

5.What will happen to flu viruses after a few months according to the passage?

A.They can return more aggressively.

B.They may have eased

C.They had killed millions of people worldwide by 1918.

D.They may disappear and won’t return.

阅读下面短文,根据短文内容回答下列各题。把答案写在每小题后横线上。

  One day Dickson Despommier, a public health professor at Columbia University, and his students developed an idea. They imagined people in cities growing crops inside a tall building. Tomatoes could grow on one floor of the skyscraper, potatoes on the next, small animals and fish on the floor above.

    This vertical (垂直的) farm could have space for restaurants and other places, like schools or hospitals. They could serve foods that are truly locally grown.

     But why would anyone want to build a farm indoors in a city? Dickson Despommier believes it will become necessary. The world needs to find places to produce enough food the growing population. Space, he says, is important.

The professor also points to problems of traditional farms. They use a lot of freshwater. Their fertilizer and animal waste can pollute water resources. And their growing seasons can be limited.

   But inside the vertical farm, crops could grow all year. And there would be no wind to blow a-soil. Farmers would not have to worry about too much or too little rain, or about hot summers, freezing winters or insects (昆虫). And without insects there would be no need for chemicals to kill them.

1.What was the idea of Dickson Despommier and his students?

                                                            

2.What does the underlined word “they” mean?

                                                           

3.Why would Dickson Despommier believe it will become necessary to build a farm indoors in a city?

                                                           

4.How many problems of traditional farms does the professor point to?

                                                           

5.Translate the underlined sentence in the last paragraph.

                                                           

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