24. you will (lose) weight if you give up junk food.
25. if you....(do not water) plants,they die.
26. if i...(were) you, i would start training for the marathon soon.
27. if the match...(starts) late, we will miss the bus home.
28 if he ran faster, he would (win) a medal.
29. i won`t join the zumba class unless you (join) me.