– Miss Smith never wastes money on anything too expensive, even though she can ________ to.

– Yes, she does. She has given much of her money to charities.

A．allow

B．pay

C．afford

D．send

总产出固定并且国民储蓄与利息率无关时，税收的增加将（）

A.使垂真的储蓄曲线向左移动

B.减少投资

C.增加消费

D.减少均衡利率并增加投资