1.He is too young to drink the beer.
He is not old enough to drink the beer.
He ls so young that he can't drink the beer.
2.I eat so much bread that I am too full.
3.He has already had his bike repaired.
4.Enough attention to the heavy traffic when you cross the street.
5.He found it very difficult to slove the problem.
6.He said that he had a lot of things to eat.
7.It isn't my bag and it must be others'.
8.Take your umbrella,or you will be wet.
9.I didn't know which to buy.
I wondered which I could buy.