_____with what they had done, we felt we still had too much to do.

A．compared

B．comparing

C．having compared

D．being compared

鼠标事件是指操作鼠标所引发的事件，下列不属于鼠标事件的是______。

A．“鼠标按下”

B．“鼠标移动”

C．“鼠标释放”

D．“鼠标锁定”