某商品在进价的基础上加20%作售价，由于过季销售，又按8折出售，则按进价赔或赚的百分比为（ ）。
4%
Mr. Liu dreamed ____ a big house for his parents after they retire.
A．to buy
B．to buying
C．of buying
D．of being buying
经多次煎炸使用后非食用的混合油
