The passage is probably taken from（）

A．It is important to be on time for class in the United States.
B．The importance of being on time differs among cultures.
C．People learn’ the importance of time from the culture they are in.
D．Students being late for class should explain the reason to their teacher.

A．a modern computer won’t be down
B．computers can take the place of humans
C．there will be great changes in computers
D．sometimes a computer may bring suffering to people