`~rai~`

`text{1.I am happier in school than I was before.}`

`text{2.Cities are mor polluted they were ten years ago.}`

`text{3.She is more intelligent than I thought.}`

`text{Bài 2:}`

`text{1.more difficult than}`

`text{2.more dangerous than}`

`text{3.more boring than}`

`text{4.more confident than}`

`text{5.more exciting than}`

`text{6.better than}`

`text{7.heavier than}`

Bài 1:

1. I am happier in school than I was before.

2. Cities are more polluted than 10 years ago.

3. She is more intelligent than I thought.

------------------

1. more difficult than

2. more dangerous than

3. more boring than

4. more confident than

5. more exciting than

6. better than

7. heavier than