单项选择题
A．The box fell down and hit the man on the head. B．The box continued to go up. C．The man went up to the top of the building. D．The man fell down and broke his legs.
A．The two-way radio is like a telephone for Australian farmers. B．Families on large farms could keep in touch with each other by radios. C．The two-way radio is like a newspaper for Australian farmers. D．All the Australians live on dry places, and they use radios in many ways.
A．always went to school together B．could have lessons on the radios C．listened to teachers at school D．built radio schools with teachers