Ответ:

ex 4

1 prettier

2 more difficult

3 faster

4 worse

5 more expensive

6 easier

7 more interesting

8 farther

9 uglier

10 more exciting

ex 5

1 more popular than

2 nicer than

3 bigger than

4 cheaper than

5 friendlier than

6 better than

7 more dangerous than

8 colder than

9 more expensive than

10 more beatiful than

ex 6

1 on

2 on

3 by

4 on

5 by

6 on