单项选择题 ()you have said is very important to us.A、 WhatB、 ThatC、Whose

单项选择题 The price of commodities()on many factors like quality, demand, supply, etc.A、 is basingB、 has basedC、 is based

单项选择题 According to law, taxable services refer to transportation,()finance, insurance and the like.A、 operationB、 constructionC、 introduction