The silent killer — air pollution causes seven million premature (过早的)     1     (death) a year, not just in     2     (develop) countries but also in UK and the USA as well. In China，people are well aware of the health problems it brings.

I check every part every day. If it has heavy air pollution, I will prepare masks for my family. I dislike     3     when the air is bad. Because bad air makes it difficult for me to breathe and I think it does influence my     4     (perform) at work. A new research in china has also found a link between air quality and levels of intelligence. In the study, 25,000 people living across China     5     (test) in language and math skills last year. They found the results of those     6     lived in more polluted areas were     7     (negative) impacted, especially in languages. It adds to a growing body of evidence that air pollution has an effect not just on the lungs and heart     8     on the brain.

This research shows that the longer we are exposed to air pollution, the     9     (many) problems we’re storing up for later life. Campaigners hope this study will persuade the British government     10     (think) hard before it publishes its clean air strategy next year.