B．from 2010,109 countries banned smoking in restaurants

　　C．Bloomberg had trouble banning smoking

　　D．nearly 500,000 Americans die every year

　　答案　C

　　解析　推理判断题。根据第四段第二、三句“Remember when he first proposed a smoking ban in New York，back in 2002？Many people didn’t think his idea practical.”可推知，当Bloomberg首次提出在纽约禁烟时，很多人认为那不现实，可以判断他的禁烟之路走得不太平坦。故C项正确。

　　4．What is the main idea of the last paragraph?

　　A．Smoking rates in New York have decreased.

　　B．The smoking ban benefited New Yorkers a lot.

　　C．New Yorkers saved more on health care costs.

　　D．Fewer were admitted to hospital for heart attacks.

　　答案　B

　　解析　段落大意题。根据最后一段的主题句“The benefits in New York were seen almost immediately.”可知，本段主要讲禁烟给纽约人带来的好处。故B项正确。

　　B

　　We all have a fair idea about the common types of environmental issues.However，light pollution may be a new term to many of us.But，the fact is，artificial light does affect the natural light levels in the same way as other man­made sources.Similar to other pollution types，it affects mankind，other living forms and the environment as a whole.

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