Question

______ Lucy were not given timely treatment, she would suffer from a cough for the rest of her life shocked her parents.

1. A.
   That
2. B.
   If
3. C.
   That if
4. D.
   If that

Answer 1

C
if 从句做主语，不少成分用that, that不可省。整个句子的谓语为shocked