Underline the correct word(s) in each sentence

1 Underline the correct word(s) in each sentence.
1 If you press /will press that button, a bell rings.
2 f you wear your coat tomorrow, you aren't/won't be cold.
3 If1 feel/will feel tired, I go to bed early.
4 If you will come / come back next week, David will be here.
5 Ifit rains/will rain tomorrow, we'll stay at home.
6 IfI go to university when I am older, I'll work / work very hard.