Ответ:

2) 3. He can leave school if he wants - he's old enough

4. When I visited New York last year, I didn't have enough time to see all the things I wanted to see.

5. This house isn’t big enough for a large family.

6.  Tona is very thin, she doesn’t eat enough

7. My office is very small. There isn't enough space

8.  It’s late but I don’t want to go to bed now. I’m not tired enough

9.  Lisa's not a very good tennis player because she doesn’t practise enough

3) 2. This knife isn't sharp enough to cut tomatoes

3. The water wasn't warm enough to go swimming

4. Have we got enough bread to make sandwiches?

5. We played well, but not well enough to win the game

6. I don't have enough time to read newspapers

4) 2. too heavy

3.  too low

4.  too fast

5. too big

6. too crowded

5) 3. much

4. too many

5. too

6. enough

7. too much

8. enough

9. too

10. too many

11. too much