Complete the sentences with the correct form of the verb.

1. We ... dinner if we arrive so late.

2. I'll sell the piano in case I ... some money.

3. Sue will be unhappy if she ... any presents.

4. I ... you know if you don't take your mobile phone with you.

5. Even if I try to talk to him, he ... .

6. It won't be possible unless they ... us.

7. If you ... a bath, there will be no hot water left.

8. She won't be slim if she ... eating so much chocolate.

9. The tea ... strong enough if you don't use three teabags.