How much will the man have to pay if he buys two pens.’

A．They are too expensive.
B．They are very rewarding.
C．They are too easy.
D．They are given by a strict teacher.

A．people from different countries can speak each other's languages
B．people from different countries can know each other’s cultures
C．people from different countries can know each other's languages and cultures
D．there were no difference between the two cultures