单项选择题

style='font-size:12px'>(全国卷 1 style='font-size:12px'>) 28 style='font-size:12px'>. —What would you do if it________tomorrow ?
—We have to carry it on , since we’ve got everything ready .
 A style='font-size:12px'>. rain  B style='font-size:12px'>. rains  C style='font-size:12px'>. will rain  D style='font-size:12px'>. is raining

A.
B.
 A
C.
D.
E.
F.