Put the verbs in the brackets into correct tense or form

IV. Put the verbs in the brackets into correct tense or form:

16. She may be late if she (not hurry) ________________.

17. If you are kind to me, I (be) ________________good to you.

18. If he (give) ______________ up smoking, as his doctor orders, he will be soon well again.

19. You (not pass) ________________ your driving test unless you drive more carefully.

20. He’ll be ill if he (not stop) ________________ worrying so much.