A．Reading through the news stories in a given period of time．
B．Having little time to read the news before going on the air．
C．Having to change the tone of his voice from time to time．
D．Getting all the words and phrases pronounced correctly．
A．It shows where advertisements come in．
B．It gives a signal for him to slow down．
C．It alerts him to something important．
D．It serves as a reminder of sad news．
A．It gives pleasure to both adults and children．
B．It is often carried around by small children．
C．It can be found in many parts of the world．
D．It was invented by an American Indian．