—Have you been wasting time on computer games again?

—_____. I’ve been studying a lot and I need a break.

A．No way

B．Not really

C．I don’t agree

D．I couldn’t agree more

Windows操作系统是一种( )操作系统。

A．多用户、单任务

B．单用户、多任务

C．单用户、单任务

D．多用户、多任务