– ______ you didn’t turn up at the party last weekend?

-- My plane was delayed by two hours.

A．What was it

B．When was it

C．How long was it that

D．Why was it that

在WWW上浏览和下载信息时，下列说法正确的是（）

A、必须用专门的网络下载软件才能下载网上的共享软件

B、指向网页上的图片，单击鼠标右键可以将图片另存到本地硬盘

C、网页上的信息只能以网页形式(．htm)另存到本地硬盘

D、不能脱机浏览网上下载的信息