Mary said that once ________ him you would like him and make friends with him.

A．meet

B．to meet

C．meeting

D．met

关于计算机病毒传播途径，下列说法错误的是（）。

A.通过U盘的使用

B.通过磁盘放在一起

C.通过硬盘的复制

D.通过网络传输