个人外汇买卖业务多本着钞变钞、汇变汇的原则。下列说法正确的是( )。

A．现钞可以随意兑换成现汇

B．现钞不能随意兑换成现汇，需要支付一定的钞变汇手续费

C．现汇买人价与现钞买人价总是相同的

D．现汇卖出价与现钞卖出价总是不同的

This printer is of good quality. If it _____break down within the first year, we should repair it at our

expense. [      ]

A. would

B. should

C. could

D. might