求解析：If it_____tomorrow,I will not go swimming.

题目

求解析：If it_____tomorrow,I will not go swimming.
A.rain B.rains C.will rain

答案

因为是it,所以要单三,A就排除
又因为主句将来时从句就一般现在时（主将从现）,C排除
所以选B