A. Europeans had smoked

B. Nobody smoked in the world

C. Europeans had never smoked

D. Nicotine was not in tobacco

13. In the nineteenth century smoking became popular because of the people in ______.

A. Turkey B. India C. the U.S. D. British

14. Breathing is affected by ______.

A. nicotine B. tar C. both A and B D. heat

15. Which of the following is Not right?

A. Smoking cigarettes is thought to be dangerous.

B. The U.S. government wants smokers to know the danger of smoking.

C. Cigarette smoking is the cause of lung cancers and several other deadly diseases.

D. The U.S. Public Health Service has found the cause of lung cancers and several other deadly diseases.

第二节 （共5小题；每小题3分，满分15分）

　根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Ali is from a Middle Eastern country. He now stays in the USA. He smokes a lot of cigarettes (香烟) every day. He has smoked for nine years. Ali says, " I tried to quit (放弃) smoking in my hometown, but it was impossible. My brothers smoke. All my friends smoke. At parties and at meetings, almost all the men smoke. Here in the United States, not as many people smoke.______16______"

Many smokers are like Ali: they want to stop smoking.._________17________ They know it can cause cancer and heart disease. But it is difficult for them to give up smoking because cigarettes have a drug in them. The drug is nicotine (尼古丁). People who smoke a lot need nicotine.____________18___________.

The nicotine makes him sick. In a few days, the smoker's body is used to the nicotine, and he feels fine. Later, the smoker needs nicotine to keep feeling fine. Without nicotine, he feels bad.______19_______, and many people who quit will soon smoke again. At a party or at work they will decide to smoke "just one" cigarette. Then they will smoke another cigarette, and another. Soon they become smokers again._____________20____________ .

A. It is very hard to quit smoking.

B. It will be easier to change the smoking habit here.

C. Thus nicotine makes smokers addicted to cigarettes.