—May I help you？You seem to be having some problems.

—________，thanks.I think I can manage.(2012·安徽)

A．All right

B．No problem

C．It's all right

D．There's no way

被称为“天府之国”的平原是  [ ]

A．三江平原

B．成都平原

C．洞庭湖平原

D．华北平原