要看你所买的东西是可数还是不可数名词
如：How much is the rice?It ’s eight dollars.
How much do the apples cost?They are eight dollars.
不明白的再问哟,请及时采纳,多谢!这道题的问题是How much is the shirt? 那应该选哪个啊the shirt 是单数，所以用代词 it 代替，答案： It‘s eight dollars.