1. i didn't go to school yesterday, because I had a bad cold

2. athough she can't play piano,  lan can sing very well 

3. if we use the car all the time, we will make the air dirty

4. tea is the most popular drink in london

5. my brother can swim very well but he can't play badminton

6. i don't like watching news because it's boring

7. although i was tired last nigh, i stayed up late to watch a game show

8. if we cut down more trees, there will be more floods

1. I didn't go to school yesterday because I had a bad cold

2. Athough she can't play piano, Lan can sing very well 

3. If we use the car all time, we will make the air dirty

4. Tea is the most popular drink in london

5. My brother can swim very well but he can't play badminton

6. I don't like watching news because it's boring

7. Although i was tired last nigh, I stayed up late to watch a game show

8.If we cut down more trees, there will be more floods