I don't know _____ it will rain tomorrow.A.if B wether 为什么?I don't know _____ it will rain tomorrow.A.if B weather 为什么?

问题描述:

I don't know _____ it will rain tomorrow.A.if B wether 为什么?
I don't know _____ it will rain tomorrow.
A.if B weather 为什么?