15. If the weather ________doesn't change___________(not change) we will reach the top of the mountain.
16. Dinner_____was______ (be) fine if the meat weren’t cold.
17. I’m sure Benny ___will come___________(come) if you wait a bit longer.
18. If you ring the bell, somebody______will answer________ (answer) it.
19. If Bert _______saw_______(see) you, he would have talked to you.
20. You _______could find_____________(find ) your ticket if you had looked into your pockets.
21. You____will fall_________________ (fall) ill if you eat so much.
22. What ______happened_________(happen) if the door had not been opened?
23. If Chris asked you for a cigarette, ________Could you give________(you, give) him one?
24. If you________wanted to buy________ (buy) that big car, you would need a lot of money.
25.______Would you change_______________ (You, change) the colour of your hair if I asked you to do so ?
26. If you give me the letter, I _____will post_______________(post) it for you .
27.____Would you post______________ (You, post) the letter if I had given it to you?
28. If the weather is fine, I__will go_____(go) swimming.
29. If you________don't work_______ (not work) harder, you won't pass the exam.