It is the injury from breathing cigarettes that has led to the invention of e-cigarettes. Using these cigarettes requires small power from battery and these cigarettes are also available in various flavors and varied nicotine levels. Owing to the fact that the charge from a short cable is required, carrying the electronic cigarettes can’t be that easy in some case. This means that the smoking habits of individuals are in fact controlled! Also, the human body is protected from harmful smoke that is not given off by the electrical version of these new age cigarettes.
The cigarettes are in a fine pack and they are durable(持久的)! For the first time ever, tobacco smokers do not have to carry matches and lighters which may cause burns to their finger tips and boring holes into their clothes! The result is basic dignity for the smokers because they will not disrespect the non-smokers among them by polluting the air that they breathe. Electronic cigarettes and the packages they come in can also be reused, which means that a lot of money can be saved.
They are environmentally friendly. For starters, this kind of cigarettes cannot be put on unless with a source of an electrical current. This means that rooms and pathways do not, under any circumstances, get filled with smoke just because a smoker passed by! The smoke is done away, meaning the air, even around a smoker, is always fresh! Disposals(处理) for the cigarettes have also been invented so that there are no harmful smoking bits and pieces carelessly thrown away which pollute the environment!
E-cigarettes have made the world a better place at the very least. Those who are addicted to smoking on a regular or even irregular basis can therefore do so responsibly and give better consideration to their health.
It’s learned from Paragraph 1 that    .

A．the original smoking habits of smokers are hard to control

B．e-cigarettes have different tastes and nicotine levels

C．the electronic cigarettes are convenient to carry

D．the short cable is used to determine how fully the batteries are charged

What’s the main idea of Paragraph 3?

A．Why do e-cigarettes produce no smoke.

B．E-cigarettes are environmentally friendly.

C．Why are disposals for the cigarettes invented.

D．E-cigarettes benefit both smokers and non-smokers.

According to the author, e-cigarettes    .

A．matter less to heavy smokers

B．are right alternatives to smokers

C．shouldn’t be overvalued

D．should be made cheap

What’s the purpose of this passage?

A．To introduce an invention.

B．To describe the wide spread of e-cigarettes.

C．To explain the injury from breathing cigarettes.

D．To show how to smoke e-cigarettes.