A．Because we fail to listen carefully when they talk.
B．Because people tend to be annoyed when we check what they say.
C．Because people usually state one thing but means another.
D．Because we tend to doubt what our friends say.

A．If a child is given an allowance, he or she may spend all the money very soon.
B．If a child is given an allowance, he or she may be spoiled and finally mined.
C．If a child is given an allowance, he or she may feel responsible and careful about money.
D．If a child is given an allowance, he or she may lose the money and can not return home.