Complete the sentences with the first conditional.

1. If he
(not like) the book, he
(not buy) it.
2. If I
(do) the dishes, they
(cook) the dinner.
3. She
(go) to the theater if the play
(be) interesting.
4. If you
(speak) more quietly, you
(not wake) the baby.
5. They
(pay) if she
(not have) any money.
6. If you
(speak) to her about it, I'm sure she
(understand).