单项选择题
Passage Two Questions 31 to 33 are based on the passage you have just heard.
A.Produce green food. B.Waste no food. C.Quit eating meats. D.Grow vegetables.
A.Without intervention they will be a headache to the nation. B.With support they can be brought back to a normal life. C.They readily respond to medical treatment. D.They pose a serious threat to social stability.
A.They are eager to become famous. B.Many lack professional training. C.Few will become successful. D.They live a glamorous life.