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 Pastear's arm and leg were disabled D．Louis Pastear cured a boy who had been badly bitten by a mad dog
A．Pardon B．Thank you C．Excuse me D．Yes, thanks a lot
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' 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.