D．More than 20 years.

　　答案　B

　　解析　细节理解题。根据第一段的最后一句“In 2003，Chinese pharmacist，Hon Lik invented the electronic cigarette as a safer，and cleaner way to breathe in nicotine...”可知，电子香烟最早是在2003年发明的，距今(2017年)大约有11年。

　　2．What’s the direct reason why Hon Lik invented the electronic cigarette according to the passage?

　　A．Tobacco cigarettes caused health problems.

　　B．Tobacco cigarettes were too expensive for consumers to buy.

　　C．Quitting smoking became one of the hardest things to do.

　　D．His father died from lung cancer due to smoking tobacco cigarettes.

　　答案　D

　　解析　细节理解题。根据第一段的最后一句话可知，Hon Lik发明电子香烟的直接原因是他的父亲因为长期吸烟而患上肺癌，最终去世了。

　　3．Since when have Chinese smokers been able to buy Hon Lik’s electronic cigarettes according to the passage?

　　A．2000.

　　B．2003.

　　C．2004.

　　D．2005

　　答案　C

　　解析　细节理解题。根据文章第二段首句“Hon Lik applied for his first patent on the electronic cigarette in 2003 and afterwards introduced e­cigs to the Chinese market in the following year...”可知，虽然他在2003年就申请了电子香烟的专利，但直到2004年他的产品才推向中国市场。

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