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    Smoking is harmful. But as soon as you quit the habit, everything will be OK, right?

    Wrong.

    New research has found that even if you give up smoking, the damage it has done to your genes (基因) will stay there for a much longer time.In the research, a team of US scientists studied the blood of 16,000 people. Among them, some were smokers, some used to smoke, and the rest were non-smokers. Scientists compared their genes and found that more than 7,000 genes of smokers had changed--a number that is one-third of known human genes.

    According to NBC News, both heart disease and cancer are caused by genetic changes. Some people may have had the changes when they were born, but most people get them in their day-to-day lives while doing things like smoking.

    When you stop smoking, a lot of these genes will return to normal within five years.

    This means your body is trying to heal (治愈) itself of the harmful effects of smoking. But the changes in some of the genes stay for longer. They can stay for as long as 30 years, It’s almost like leaving a footprint on wet cement (水泥)----it will always be there, even when you’ve walked away and when the cement becomes dry.

    Although the study results may make people unhappy, there is a bright side: the findings could help scientists invent medicine to treat genetic damage caused by smoking or find ways to tell which people have heart disease or cancer risks.

    1.The function of Paragraph 1 is to_________ .

    A. introduce the topic of the passage B. give an example

    C. make an argument D. show the main idea of the passage

    2.Most genetic changes happen because of___________ .

    A. people’s condition at birth B. environmental pollution

    C. people’s bad living habit D. heart disease and cancer

    3.The underlined word “it” in Paragraph 6 refers to__________ .

    A. the footprint B. the cement

    C. the harmful effect D. the genetic change

    4.Which of the following statements is true?

    A. The findings are the fruit of more than three years’ research.

    B. The findings have prevented more people from starting smoking

    C. The findings offer evidence that a damaged gene can heal itself.

    D. The findings help to find cures for genetic damage caused by smoking.

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    Monthly Talks at London Canal Museum

    Our monthly talks start at 19:30 on the first Thursday of each month except August. Admission is at normal charges and you don’t need to book. They end around 21:00.

    November 7th

    The Canal Pioneers, by Chris Lewis. James Brindley is recognized as one of the leading early canal(运河) engineers. He was also a major player in training others in the art of canal planning and building. Chris Lewis will explain how Brindley made such a positive contribution to the education of that group of early“civil engineers”.

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    An Update on the Cotswold Canals, by Liz Payne. The Stroudwater Canal is moving towards reopening. The Thames and Severn Canal will take a little longer. We will have a report on the present state of play.

    March 6th

    Eyots and Aits-Thames Islands, by Miranda Vickers. The Thames has many islands. Miranda has undertaken a review of all of them. She will tell us about those of greatest interest.

    Online bookings: www.canalmuseum.org.uk/book

    More info: www.canalmuseum.org.uk/whatson

    London Canal Museum

    12-13 New Wharf Road, London NI 9RT

    www.canalmuseum.org.uk www.canalmuseum.mobi

    Tel:020 7713 0836

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    A. February 6th. B. November 7th.

    C. March 6th. D. December 5th.

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    C. Chris Lewis. D. Miranda Vickers.

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