成本产品率越高，则（）。

A.单位产品产量或产值的成本越低

B.单位成本提供产品产量或产值越多

C.单位产品产量或产值的成本越高

D.单位成本提供的产量或产值越少

E.利润总额越多

My son wants to know if we can _____ John for the night, since he has lost all his money and can go nowhere．

A．put off

B．put on

C．put up

D．put forward