Comeplete the sentences using going to or will

Bài 1. Comeplete the sentences using going to or will
 16. I ( do )                                     it for you tomorrow.
 17. My father ( call )                                you in 5 minutes.
 18. We believe that she ( recover )                                          fromher illness soon .
 19. I promise I ( return )                           to school on time. 
 20 . If it rains , he ( stay )                         at home .
 21 .              You  ( take )                 me to the zoo this weekend ?
22. I thik he ( not come )                                back his hometown.