--I wonder how you have improved your spoken English so fast, Li Lei.

--          Chatting with my foreign friend.He’s been here for some time,you know.

A．On

B．With

C．In

D．By

到目前为止，邮政部门已经放弃了信函的垄断的国家包括（）。

A.瑞典

B.芬兰

C.阿根廷

D.巴拉圭

E.秘鲁