1 . Complete the dialogue with the correct form of the words and phrases below.

downtown	jam	suit	greenhouse gases
public transport	complain	anger	get stuck in traffic

Martin: Good morning, Mary. How do you always manage to the office before me?
Mary: Morning, Martin. Well, I cycle so I don’t     1    .
Martin: Well, I don’t cycle but I do take     2    . It’s not quite as fast as cycling but it gets me     3     much quicker than if I take my car.
Mary: Public transport is also a good way to help reduce the level of     4     in our atmosphere. If more people take the bus and train, it would be better for us all.
Martin: I know so many people who     5     about traffic     6     and air pollution, but     7     cannot solve the problems.
Mary. That kind of attitude is common but I think more and more people are beginning to do something which     8     them and protect the environment.

2 . Directions:Complete the following sentences by using the proper form of the words or expressions   given in the frame.Each one can only be used once.

A. capable        B. effectiveness       C. employing        D.exposure          E.famously           F. joining          G. limitation        H. minimal       I.precisely        J.recognizing       K.worthwhile

Clean Air Act

The air in modern homes and offices is pretty clean,but not as clean as it might be.Often it contains small amounts of volatile(挥发性的）,poisonous,organic compounds.Long-term    1     to these is a bad thing,so clearing them out of the air people breathe is widely accepted as     2    

Finding an effective way to do so has proved difficult.But Stuart Strand, Long Zhang and Ryan Routsong, of the University of Washington,in Seattle,think they have succeeded,As they report in Environmental Science and Technology, their method involves     3     a gene from a rabbit into a popular indoor plant nicknamed Devil's vine—a type of ivy hat is so called because it is    4     difficult to kill.

The idea of     5     plants to de- pollute   the atmosphere inside buildings has been around for decades-but has met with only qualified success. One experiment involving unmodified spider plants,for example,showed that they are indeed     6     of removing formaldhyde (甲醛) from the air.The     7     is that to make much of a difference in a space as large as a house would require turning most of the rooms into spider-plant forests.

Dr Strand, Dr Zhang and Mr Routsong thus sought something suitably transgenic ( 转 基 因 的),but that does not flower indoors. The plant they settled on was Devil's vine,     8     because of its toughness.With the help of a bacterium,they were able to ferry the rabbit version of the gene into the plant's chromosomes(染色 体),and thus to,engineer a type of Devil's vine able to produce an air-cleaning substance. To test the     9     of their idea, the researchers put their modified ivy to work inside greenhouses filled with air containing high levels of harmful substances.The plants performed well,reducing the harmful substances in air to     10    .

3 . 阅读下面短文，从以下方框内的韵语或短语中，选出合适的单词或短语，并将其正确形式填入空白处。每个单词或短语只能使用一次，有两个是多余的。

affect       effect       environment       float             negative             extremely produce       recycle       shocking             solution       take action       thick

A Plastic Ocean a film to make you think. Think, and then act. We need to     1     on plastic. We've been     2     plastic in huge quantities since the 1940s. We live in a world full of plastic, and only a small part is     3     . What happens to all the rest? This is the question the film A Plastic Ocean answers. It is a documentary that looks at the impact that plastic waste has on the     4     .

The film begins as a journey to film the largest animal on the planet, the blue whale. But during the journey the filmmakers make the     5     discovery of a huge,     6     layer（层）of plastic floating in the middle of the Indian Ocean. This causes them to travel around the world to look at other areas that have been     7    . We see how marine species are being killed by all the plastic we are dumping in the ocean. The message about our use of plastic is     8     obvious.

But the film doesn't only present the     9     side. In the second half, the filmmakers look at what we can do to reverse the tide of plastic flowing around the world. They present short-term and long-term     10    . These include avoiding plastic containers and * single-use5 plastic products as much as possible.