单项选择题
Conversation 2
A．Helped some friends build a house. B．Sold newspapers on the campus. C．Sold advertising space for a paper. D．Asked businessmen to buy school newspapers.
A、$3oo. B、$450. C、$500. D、$600.
A．Building and selling TV sets. B．Making TV sets and repairing them. C．Building, repairing and selling things. D．Persuading people to buy newspapers.