Fire destroyed a video factory near an oil plant yesterday, running a collection of over 20,000 video cassettes. Old electric wiring is being blamed for the fire.

2().

A．college classrooms often remind people of their college life.
B．critical thinking was encouraged even a century ago.
C．a hundred years ago, desk arrangement in a classroom was quite different.
D．there is not much change in the college educational idea over the past hundred years.

A．They have the power of locomotion.
B．They have a wider range of foods than animals.
C．They are very diverse in their external appearance.
D．They are less sensitive than animals.