1. ......is not good as mine

2......is cheaper than the sports center

3....... is lower than the skycraper

4........is more difficult than test 1

5.........is dirtier than the water in this lake

6........... is more boring than life in the city

7.........is the cleverest student in my class

9...... is more expensive than this television

...........isn't as expensive as that one

10.....is not as interesting as this one

.........is more boring than this one

11.....isn't as difficult as Math

.........is easier than Math

12 .... is diffirent from mine

13.....is the best student in her class

14... is more confident than Lan

.......is as confident as Lan