When Peter Sanger and Liang Wu got together, it    1    （strike）them that they must be long-lost friends, Both firm advocates in the fight    2    air pollution, they believe that if you can't measure it, you can't beat it. That's    3     they founded Green City Solutions: "The solution to quantifiably improve city air."

The invention—the City Tree—act as an air purifier-an interesting    4    （add）to urban trees and green spaces. Rooted in science, air pollution can be eaten by the vertical flat-paneled（平面的）"trees"    5    （dot）around cities across Europe, while the "trees" also act as seats for pedestrians Sanger and Wu's vision is for a world in which people in cities can live    6    （healthy）. They long to create living conditions that allow all people around the world to permanently have cleaner air    7    （breathe）.

Using remote technology, the City Tree combines    8    air-purifying feature of moss with remote technology to increase the air flow through the "trees". This allows them to "suck up" and clean more air than normal, and the amount they filter can be increased    9    （depend）on pollution levels at different times of day.

The German green-tech start-up is now funded by the European Commission to set up a City Tree network of 15 brand new units and test it in a    10    （science）way in Berlin's pollution hotspots next year.

Lin Shuiqing: Good morning, everyone. First I am talking to you today about the way vast areas of the world are damaged by chemical waste. Many places have been destroyed and many plants and animals     1    (die). Other types of waste flow into our water,     2     (kill) river and sea life.

Much sea life is being destroyed by fishing boats as well. These boats catch large numbers of fish without    3     (give) them time to lay eggs. This will result    4    a smaller number of fish left for us to eat in the future.

Qian Liwei: Good morning, ladies and gentlemen. Thank you, Ms Lin. That was    5    interesting speech. It is clear that you are very concerned about the present situation of our environment. When people think of    6    (factory), they think of clouds of dirty smoke or of pipes pouring chemical waste into rivers. People often have this belief     7    development is bad for the environment. What I’m here to say is that       8     (work) with many environmental consultants, I know that a healthy environment and development should be    9    ( possibly) at the same time. What we need are better laws    10     (preserve) the environment and still allow our country to grow.