It’s (danger) ______ for children until 12 to ride the bicycle on the road.

A．tell how couples like each other
B．show the life experience of husband and wife
C．explain why couples grow alike
D．describe the study on a number of married people

A．she has tried to earn her living by providing service for human beings
B．she has tried to provide service to people in need of humane consideration
C．she has tried to work for the cause of law at any cost
D．she has devoted herself to the public relationship in spite of loss of income