阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式，并填在答题卡的相应位置。Cigarette smoking is responsible for more than 480, 000 deaths in the United States each year, 【小题1】(include) 41,000 from second-hand smoke. That makes tobacco the 【小题2】(large) cause of death and disease in the U. S. Worldwide, about 7 million deaths each year are due 【小题3】 tobacco use.
Smoking is associated with cancer, heart disease, stroke and other chronic lung conditions. People with depression, anxiety and other forms of mental illness are much more likely to smoke than 【小题4】 general population. While smoking may 【小题5】 (use), in part, as a comforting behavior, it is not a valid 【小题6】(treat) for any mental health condition.
Smoking is 【小题7】(high) addictive. The young are at higher risk of becoming addicted to nicotine, a drug found in tobacco. An addiction to nicotine, also 【小题8】 (know) as nicotine dependence, often begins in one’s teens.
In the short term, nicotine may distract people from unpleasant feelings. Once smokers become dependent on nicotine, however, they experience physical and mental withdrawal symptoms 【小题9】 last for days or weeks, making it very difficult 【小题10】 (quit). Many people who are addicted to nicotine continue to smoke even though they know it’s bad for their health.
