单项选择题
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
A．a degree which is the highest in science B．a person who works in the lab C．the post in science D．someone whose job is to make sick people well again
A．Because he wondered whether the student could really speak good English. B．Because he could hardly hear what the student had said. C．Because he wouldn't like others to say "No". D．Because the way to accept a compliment in China is not the same as that in the western countries.