根据句意,用恰当的介词填空

问题描述:

根据句意,用恰当的介词填空
1.what are the dought the coming vacation
2.My uncle is hiking the mountain this friday
3.my best friend sent me these phtots *
4.l’ll show you how to do it when l get back school form San francisco
5.cathy's fathe is going to Hawaii December 4th

on to