A. has no real function in communication at all
B. is usually meaningless and therefore useless
C. is not as idle as it may seem to be
D. is restricted to certain topics only
A. to invade other's private affairs
B. to share a secret between intimate friends
C. to open and maintain channels of communication
D. to protect one's own privacy
A. some political issues
B. one's physical condition
C. other's ways of dress
D. the traffic jam
A. It is used by people to encourage those who are confronted with danger
B. It is used to show that one is enthusiastic and hospitable
C. It is used to create a more friendly atmosphere and to avoid embarrassment
D. It is used by people to protect others in the threatening situation