Please check this carefully

Exercise 1
Complete the sentences with the correct form of the verbs given in brackets.
1. If you catch the first bus, you ________________ there in time. (get)
2. If she ________________ here, I will phone you. (come)
3. If you try again, you ________________. (succeed)
4. If you heat iron, it ________________. (expand)
5. We ________________ ready if you come at five. (be)
6. If they ________________ today I'll ring her up. (come)
7. I'll see him if I ________________ am free. (be)
8. If we ________________ we'll miss the train. (not, hurry)