Whydopeoplesmoke的精选

问题详情：阅读理解读下列短文，从每小题后所给的A、B、C、D四个选项中，选出最佳选项。Whydopeoplesmoke?Onereasonisthatpeoplebecomeaddictedto(对……有瘾)cigarettes.Theaddictivesubstanceincigarettesisnicotine.Whe...