单项选择题

According to the passage, man will begin to think about such needs as housing and clothing only when（）

A．he has saved up enough money
B．he has grown dissatisfied with his simple shelter
C．he has satisfied his hunger
D．he has learned to build houses

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单项选择题

A．fried
B．cooked
C．eaten
D．decorated

填空题

56（）