On the Chinese social media site Weibo, many users complained about the pollution and shared their concerns.__4__. Nowadays, there is a sarcastic play on the expression “serve the people”， as the two have a similar pronunciation.

　　“__5__. There won't be a sudden outbreak of symptoms, but normally three to five days after the smoggy weather occurs, there is a peak in the number of people seeing doctors，” Deng Ying, a doctor at the Second Affiliated Hospital of Harbin Medical University was quoted as saying.

　　A．The impact of air pollution on people will be gradual

　　B．Smog has been regarded as the biggest killer nowadays in China

　　C．Just days previously, the World Health Organization classified air pollution as carcinogen (致癌物)

　　D．The faster smog comes, the faster it goes away

　　E．References to “feed people with smog” have become popular on Weibo

　　F．40 times the safety level reminded by the World Health Organization

　　G．And meanwhile, the risk of bladder cancer is also closely connected with it

　　本文讲述了雾霾天气对于人类健康的影响，甚至会导致癌症。

　　1．F　承接上文“...reached levels of 1,000 micrograms per cubic meter”， 故选F项。

　　2．C　段首句概括全段，引起下文，C项符合语境。

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