Question

12) If the weather (to be) fine, my family (to go) on a trip.
13) I (to give) a present if he (to invite) me to his birthday party.
14) Of course we (to help) you if we (not be) busy.
15) I ( to see) my mother before I (to fly) to London.
16) If my daughter (not to come) in time, I (to go) without her.
17) They (to wait) until we (to come).
18) we (not to send) you the money before we (to leave).
19) If Jane (to come) to see me, we (to listen) to the music.
20) When they (to talk) to her, they (to give) her your news.

Answer 1

12. is // will go
13. shall give // invites
14. we'll help // are not
15. I'll see // fly
16. doesn't come // I'll go
17. will wait // come
18. shall not send // leave
19. comes // shall listen
20. talk // will give