Question

If ________ within half a day after it was caught, the fish will taste good．

1. A.
   cooks
2. B.
   cooked
3. C.
   cooking
4. D.
   is cooked

Answer 1

B
从句中动词cook的逻辑宾语是主句的主语fish，它们在语法上是动宾关系，即fish应该是cook的宾语，因此cook用-ed形式。其前加if，强调了这是一个条件状语从句。