How do you know which bus to take if one goes somewhere（）

单项选择题Communication is important because it can help people to（）

A．understand the world and other people better
B．teach each other to speak, write, read and draw
C．know what other people are thinking about
D．learn what's happening in the world more quickly

单项选择题What can help us know what is going on in the world（）

A．Books.
B．newspapers.
C．TV and radios.
D．A,B,C and others.