问题补充：
no matter how,howeverive already told you that im going to buy it,( ).用no matter how it costs还是however much it costs啊,这是非限制性定语从句吗?怎么选啊
答案：
当然选no matter how it costs
因为它的意思是 ‘无论它要花多少钱,我都要去买’
如果是however much it costs,除了语法上有错误,还有英语根本没有这样表达的.
======以下答案可供参考======
供参考答案1:
前者
