用适当介词填空
问题描述:
用适当介词填空
what is your sister doing _____ vacation?
I am going to beijing ______ my mother.
She is relaxing ____home.
I will visit my friend _____tibet.
we will stay there only for there days.we don't like going away _____too long.
这是用现在表将来.
答
on with at in for