以这么快的速度　　   

阅读理解: 阅读下列短文, 从所给的四个选项中, 选出最佳答案。

　　     People have smoked cigarettes(香烟) for a long time now. The tobacco which is used to make cigarettes was first grown in what is now part of the United States. Christopher Columbus, who discovered America, saw the Indians smoking. Soon the dried leaves were transported (输送) to Europe where smoking began to catch on, In the late 1800s, the Turks made cigarettes popular.

　　     Cigarette smoke contains at least two harmful substances (物质), tar and nicotine. Tar, which forms as the tobacco burns, damages the lungs and therefore affects breathing. Nicotine, which is found in the leaves, causes the heart to beat faster and increases the breathing rate (速度).

　　     Smoking cigarettes is dangerous. The U. S. Public Health Service stated that cigarette smoking is the cause of lung cancer (癌) and several other deadly diseases (疾病). The U. S. government now requires that each package of cigarettes bear a special warning about the dangers of smoking.

1. A good title for this selection is _________.

[    ] 　　

A. Cigarettes in the U. S.

B. Smoking Cigarettes　　

C. How to Smoke Cigarettes　　　　 　　

D. The Effect of Smoking on Your Health

2. The expression "catch on" means _______.

[    ] 　　

A. cost a lot　　    B. slow down　　

C. become popular    D. understand and make use of something

3. Before Columbus discovered America, ______.

[    ]

A. Americans did not smoke cigarettes　　

B. Europeans did not smoke cigarettes　　

C. nicotine was not in tobacco　　

D. Both B and D

4. In the nineteenth century, smoking became popular because of the people in ________.

　　[    ] 　　

A. India　　   B. America　　

C. Turkey　　  D. Europe

5. Breathing is affected by ________.

[    ]

A. tar　　　　　　 B. nicotine　　

C. Both A and B    D. Neither A nor B