Question

I don't know when he ________ tomorrow. I think if he ________, I'll go to see him.

1. A.
   comes; comes
2. B.
   will come; comes
3. C.
   will come; will come
4. D.
   comes; will come

Answer 1

B
①为宾语从句，根据句意该用一般将来时，②为条件状语从句应用一般现在时代替将来时。