56（）

单项选择题Which of the following can be cited as an example of the use of money in exchange for services（）

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.

单项选择题According to the passage, memory is considered to be （）

A．the basis for decision making and problem solving
B．an ability to store experiences for future use
C．an intelligence typically possessed by human beings
D．the data mainly consisting of words and combinations of words