3.

In this article the writer's aim is to show that...

A.    public speaking need not be anything to worry about.
B.    there is always something new for a speaker to learn.
C.    it Is important for a speaker to have an outgoing personality.
D.    success in public speaking depends on the quality of the speaker's memory.

4.

The writer says he trained in how to speak at conferences by...

A.    studying articles written by well-known public speakers.
B.    attending a course on how to give effective presentations.
C.    getting help with the physical aspects of public speaking.
D.    following colleagues' advice on ways of keeping the audience's attention.