古时候人们买东西时采用的是物物交换方式，假设交换的标准是20只兔子可以换2只羊，9只羊可以换3口猪，8口猪可以换2头牛，如果一个人用1头牛去换兔子，可以换多少只（）

A．100

B．90

C．120

D．110

In Britan, a building society or bank are the official owners and the mortgage is a financial loan for anything that goes up to 100% of the value of the house, repayable over twenty to forty years.

A. that is to 100% of the value of
B. up to 100% of the value of
C. which is up 100% of the value to
D. going up to 100% of the value to