56（）

A．the computer’ s memory has a little bigger capacity than a teenager’ s
B．the computer’ s memory capacity is much smaller that an adult human being’ s
C．the computer’ s memory capacity is much smaller even than a teenager’ s
D．both A and B

A．To sell a bicycle for $ 20.
B．To get some money for old books at a garage sale.
C．To buy things you need or want.
D．To get paid for your work.