A group of 53 scientists wrote to the World Health Organisation (WHO世界卫生组织) two days before World No Tobacco Day（世界禁烟日）on May the 31st. They asked the WHO not to make e-cigarettes a tobacco product. E-cigarettes help people quit smoking. They do not have any tobacco inside them. But they make people feel like they are smoking. Doctors say this is better for people's health than real cigarettes. But the WHO says e-cigarettes are like real cigarettes.

    The scientists said e-cigarettes help to reduce disease and deaths from smoking. They are a "low-risk product" that are "part of the solution" to stop smoking, not part of the problem. They wrote: "These products could be among the most important health ways of the 21st century, perhaps saving hundreds of millions of lives." They told the WHO not to control them. Researchers from the University of Chicago said e-cigarettes could encourage young people to smoke and mean that fewer people quit smoking. 

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1.The letter from a group of 53 scientists is to______.

A World No Tobacco Day

B the World Health Organisation

C the University of Chicago

D doctors

解析：选B。B 细节理解题。根据第1段第一句A group of 53 scientists wrote to the World Health Organisation…可知，故选B。

2.What’s the difference between e-cigarettes and real cigarettes?

A E-cigarettes have no tobacco inside.

B E-cigarettes have no light.

C E-cigarettes are like sweets and good to eat.

D E-cigarettes are more expensive than real cigarettes.

解析：选A。A 内容理解题。根据第1段第4句They do not have any tobacco inside them.可知，故选A。

3.Which of the following is TRUE according to the passage?

A E-cigarettes make people not feel like smoking.

B E-cigarettes could perhaps save hundreds of millions of lives.

C People can not quit smoking.

D Researchers from the University of Chicago thought e-cigarettes were good for young people.

解析：选B。B 综合理解题。根据第2段第3句"These products could be among the most important health ways of the 21st century, perhaps saving hundreds of millions of lives."可知，故选B。

4.The WHO planned to_____according to the passage.

A sell e-cigarettes

B control e-cigarettes

C control real cigarettes

D sell real cigarettes

解析：选C。B 综合理解题。根据第2段第4句They told the WHO not to control them.可知，故选B。

5.What does the underlined word “them” refers to?

A Scientists.

B Researchers.

C E-cigarettes.

D Real cigarettes.

解析：选C。C 综合理解题。根据文章内容可知WHO打算对电子香烟进行控制，而科学家们呼吁WHO不要控制，故选C。