—Where did you find the professor who made the speech yesterday？

—It was in the hall ______ the students often have a meeting..

A．where

B．which

C．that

D．when

计算机软件可以分为（）两大类。

A、系统软件

B、文字处理软件

C、应用软件

D、图形处理软件

E、编译软件