A) Complete the sentences with the right from of the verb in brackets.
1. If I don't pass the exam, I _____ it again in January. (do)
2. You'd sleep better if you ______ less coffee. (drink)
3. Don't buy it unless you _____ sure you like it. (be)
4. If I cloud change a part of my body, I ____ my nose. (change)
5. As soon as he ____, we can have dinner. (arrive)