请回答下列问题,并解释出用法
1.If it () rainy tomorrow,I won`t go to work.
A.is B.be C.will be D.will
2.I don`t think he looks like his mother,()?
A.do me B.do you C.does he D.doesn`t he
3.You`d better take a rain coat.Because () to rain.
A.it`s going B.it will C.there`s going D.it going