单项选择题
This passage is mainly about （）
A．how Louis Pasteur's friend died B．Louis Pasteur's experience and achievements in curing rabies C．how Louis Pasteur's arm and leg were disabled D．Louis Pastear cured a boy who had been badly bitten by a mad dog
单项选择题 Pasteur became a Doctor of Science. Doctor of science here means （）
单项选择题 Why was the American surprised at the Chinese student's answer（）
单项选择题 As the student kept saying "no", the American（）
