Questions 23 to 25 are based on the conversation you have just heard.

A．No reason can explain why some people are left-handed.
B．Difference in gender and nationality is the concerned factor.
C．The culture may cause some people to use left-hands.
D．Ninety percent of people will naturally use their right hands.

A．It is not convenient to walk outside.
B．They must take charge of the house.
C．The chances of being attacked have grown.
D．They will do the housework.