题目内容：

    Vaping can be just as damaging to your health as smoking. But the minute you kick the habit, you’ll feel a difference.

Vaping is the use of electronic cigarettes-e-cigarettes. Vaping became mainstream in the United States in the late 2000s. When e-cigarettes first hit the market, people believed they were a safer choice to tobacco cigarettes. We now know, however, that vaping, like smoking cigarettes can be quite damaging to your health-and equally addictive.

Kids and teenagers are especially attracted to vaping, thanks to attractive flavors. Vape use in high school students rose by 900 percent between 2011 and 2015.

Quitting vaping can be difficult, just like trying to stop smoking. There are some immediate, though often temporary, negative effects. The positive ones soon outpace the negative, however.

In as little as 20 minutes, your heart rate returns to normal, your blood pressure drops, and your circulation starts to normalize. Your breathing may improve, too.

Daily e-cigarette doubles a persons risk for a heart attack. If you quit, however, the risk begins to fall very quickly. Also, vaping, like cigarette smoking, can blunt your senses, reducing your ability to smell and taste. After just 48 hours without vaping, you may begin to notice your ability to taste and smell food has improved. Nicotine affects more than your brain: new research suggests nicotine can raise your blood sugar, too.

Smokers often have a troublesome cough or make a breathless sound when they breathe that many refer to as a smokers cough. Smoking even e-cigarettes can badly harm your lung health and make fighting off infections difficult. Quitting, however, will help your lungs recover. After one month, your lung capacity improves.

There will come a day when the bad habit of vaping won’t have any lasting influence on your body and your health.

1.What did Americans think of e-cigarettes?

A.They were cheaper. B.They were fashionable.

C.They were less harmful. D.They were environment-friendly.

2.What makes vaping popular among kids and teenagers?

A.Its taste. B.Its price.

C.Its shape. D.Its colour.

3.What does the underlined word “blunt” in paragraph 4 mean?

A.Destroy. B.Benefit. C.Sharp. D.Dull

4.What does the author intend to do by writing the text?

A.Introduce the use of e-cigarettes.

B.Point out how e-cigarettes harm kids.

C.Encourage people to refuse e-cigarettes.

D.Compare e-cigarettes with traditional ones.