We are not going on holiday this year. _____we haven’t got the money and then there’s still a lot we need to do on the house.                                                

A．Start with

B．Starting with

C．To start with

D．Started with

将IP地址4个字节的二进制分别转换成4个十进制数，这4个十进制数之间由“.”隔开，这种IP地址的表示方法被称为______表示法。