Put the verbs in brackets into the correct form:
1. If I see him, I (give) him a lift. 2. If he (be) late, we’ll go without him.
3. I’ll be very angry if he (make) any more mistakes. 4. If you come late, they (not let) you in. 5. If you put on the kettle, I (make) the tea. 6. If I lend you $10, when you (repay) me? 7. Tell him to ring me up if you (see) him. 8. If I tell you a secret, you (promise) not to tell it to anyone else? 9. If you (not like) this one, I’ll bring you another. 10. If he (like) the house, will he buy it? 11. She won’t open the door unless she (know) who it is. 12. The police (arrest) him if they catch him.