Choose the correct form of the verbs.

1 If I earn / will earn a lot of money, I spend it!
2 I will cook / cook dinner if I get home first.
3 I get a headache if I will work / work on the computer for a long time.
4 I buy / will buy a flat next year if I save enough money.
5 If he doesn’t pass his exams, he won’t go / will go to university.
6 If the homework will be / is too difficult, I will phone you for help