• A. --traffic volume
• B. --traffic jam
• C. --annual budget
• D. --traffic regulations
• E. --traffic control
• F. --traffic signal
• G. --Olympic mascots
• H. --traffic sign
• I. --Olympic flame
• J. --double-decker
  K. --police box
  L. --collision
  M. --one way traffic
  N. --Tibetan antelope

( )交通信号 ( )警察岗亭

A．People like playing jokes on others on April 1st,
B．The popular joke is about a phone call on April 1st.
C．The man who is joked on is a fool.
D．Some of the jokes are funny, some are not.