A.Enemies exist in everyone's life.
B.Humble people have fewer enemies.
C.It is terrible to have enemies.
D.Generous people are popular.
A.Something you have read.
B.Something you have experienced.
C.Something you have heard.
D.Something you have imagined.
A.It should be avoided.
B.It is a virtue.
C.It could be kept.
D.It has a bad impact.