英语选修六第二十页答案

quit, tough 2.accustomed to 3.ashamed(ofd her)4. breathless 5. desperate 6.(The)alcoholic (effects) 7.strengthen 8.pregnant 9. disappointed 10.decide to

Exercise2:

cigarettes, alcohol, effcets, adolescents, tough,stress, due to,addicted to, mental, quit,unfit, withdrawal