单项选择题
A、 The air pollution is caused by the development of industry. B、 The city was poor because there wasn’t much industry then. C、 The woman’s exaggerating the seriousness of the pollution. D、 He might move to another city very soon.
A. A doctor’s fame strengthens the patients’ faith in them. B. Abuse of medicines is widespread in many urban hospitals. C. One third of the patients depend on harmless substances for cure. D. A patient’s expectations of a drug have an effect on their recovery.