I don't know if it ________ tomorrow．If it ________, I'll stay at home．

1. A.
   will rain; rains
2. B.
   rains; will rain
3. C.
   will rain; will rain
4. D.
   rains; will rain

—I don’t know if it          tomorrow.

—If it       ,I’ll stay at home.

A.will rain, will rain      B.rains, will rain      C. will rain,rains

—I don’t know if it          tomorrow.
—If it       ,I’ll stay at home.
A.will rain, will rain      B.rains, will rain      C. will rain,rains