On the bank of the river, we found him _____on a bench, with his eyes _____on a kite in the sky.

A．seated; fixing

B．sitting; fixing

C．seated; being fixed

D．sitting; fixed

主机和外部设备共同组成计算机系统，以下
Ⅰ．CPU Ⅱ．内存储器 Ⅲ．光存储器 Ⅳ．打印机
( )共同构成计算机系统的主机。

A．Ⅰ和Ⅱ

B．Ⅰ、Ⅱ和Ⅲ

C．Ⅰ、Ⅱ和Ⅳ

D．Ⅰ、Ⅱ、Ⅲ和Ⅳ