单项选择题
A．Black stands for unhappiness. B．Black makes people think of night. C．Black makes people think of sorrow. D．Black is the color of the mournin
A．birds are important in our lives B．animals are important in our lives C．nature is important in our lives D．Audubon was especially interested in birds
A．they try to get the things back B．they know their things have been stolen C．they know their things are at the police station D．they tell the police the whereabouts of the shown things