Here are the correct answers for the provided sentences:

12. We’ll get wet if we **go** out.
**Answer: a. go**

13. If I go shopping, I **will buy** some food.
**Answer: b. will buy**

14. If I find it, I **will tell** you.
**Answer: a. will tell**

15. What would you do if you **won** a million dollars?
**Answer: a. would win**

16. They’d be hurt if I **didn't go**.
**Answer: b. didn’t go**

17. If we took the 6:30 train, we **wouldn't go** too early.
**Answer: d. wouldn’t go**