题目

完形填空   When we see a cigarette box, we’ll see “ Smoking is harmful to your health” on it. Children are not  1   to smoke by their parents or teachers. But in many countries   2   is becoming a bigger problem for young people. Most smokers 3   in their teens or earlier. Some students think smoking is very cool, and they can see many people smoking around them. They want to have a   4  . “If young people start smoking early, they will probably get addicted(上瘾的) to nicotine(尼古丁). And it will be very hard to   5  later on,” said a professor. A study sTom is ________English. [　　] A．aB．an C．theD．×