—HowaboutbuyinganiPhone6plusforyourmother’sbirthday?—Oh...

问题详情：

—How about buying an iPhone6 plus for your mother’s birthday?—Oh, maybe it’s too expensive, Dad, do you know _______?

A．how much does it cost    B．how much it costs

C．how much it cost            D．how much did it cost

【回答】

B

知识点：宾语从句

题型：选择题