_____ .I don't know.

问题描述:

_____ .I don't know.
A.Whether it is raining or not.
B.If it is raining or not
C.Whether it were raining or not
D.If it was raining
选什么啊,为什么?

A.Whether it is raining or not.
进行时态表将来
是否要下雨,我不知道.if表示是否的意思,不能用在句首.