Question

I don't know if she     to my birthday party tomorrow. If she    , I'll be very happy.
A. comes; comes       B. will come; comes      C. comes; will come

Answer 1

B解析:
宾语从句和条件状语从句的考查。由if引导的条件状语从句，用一般现在时态，主句用一般将来时。当if做是否讲时，所引导的宾语从句通常是一般将来时。