一个完整的微型计算机系统应包括( )。

A．主机、键盘、显示器、软盘

B．计算机及外部设备

C．系统硬件和系统软件

D．硬件系统和软件系统

Wang Fan, could you give us _____ on how to learn English _____? [ ]

A. some advices; good

B. some advice; good

C. any advices; well

D. some advice; well