A．It indicates that latecomers don’t care about others’ time.
B．It indicates that latecomers always ignore other people’s feeling.
C．It indicates that latecomers enjoy being looked at by others.
D．It indicates that lateness is their way of life.

A．A complicated system of several food chains.
B．A society that distributes food.
C．The relationship of one green plant to another.
D．The device that spiders use to catch food.