_____ .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?
答
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.