A．They are often more influential on children than those spoken casually.
B．They are full of sorrow and misery.
C．Children's awareness of parents' words is always acute.
D．These words are imperative for children with great sense of obligation.

A．people's emotions are influenced by the words they say
B．people should use words with more carefulness
C．people should only accept words which are truths rather than opinions
D．what people experience directly decides what they speak

A．may be less influential as time passes by        
B．may improve people's life 
C．can change the world
D．can change time