• 英语句型学口语 Lesson 78:It's up to... 78.It'supto...由······来决定用法透视"to"后面接代词宾格或名词,表示"由......来做决定;取决于......;是......的职责"。支持范例1.DoyouwanttoeataWesternorChinesemeal?It'suptoyou.吃西餐还是中餐?由你来......