单项选择题
A. What about you B. Would yon like black tea C. Do you have any eggs, madam D. Would you like something to eat E. Black tea or iced tea F. Can I help you G. Thank you very much. H. It is very tasty.
A．They did not know how to treat the unfamiliar illnesses. B．They were more interested in establishing practices in the cities. C．They were more concerned with doing research than with treating patients. D．They were often overcome by diseases caught from their patients.
A．could B．can C．would D．will