7.In my opinion she shouldn't eat so many sweets.
WERE
If........., I wouldn't eat so many sweets.
8.Somebody waters the plants 3 times a week.
WATERED
The plants......3 times a week.
9.Peter can't be a professional basketball player.He's too short.
NOT
Peter is.....to be a professional basketball player.
10.Everyone likes Tom.He is so helpful.
SUCH
Tom is......person that everyone likes him.