1. It's too hot . Opening the window, please ( I suggest)

=> I suggest opening the window .
2. I'd love to play volleyball. I have to complete an assignment ( using "and" or "but")

=> I'd love to play volleyball ,but I have to complete an assignment .
3. we are saving money. We want to buy a new house (so)

=> we want to buy a new house, so we are saving money.
4. the people  keep having parties all nights. They live next door ( who)

=> The people, who live next door, keep having parties all nights.
5. these are the keys. They open the front door and back door ( which)

=> These are the keys which open the front door and back door .
6. it was hot,  so we decided to stay at home.
=> Since it was hot, we decided to stay at home.
7. the boy is very intelligent. He lives next door to me (who)

=> The boy, who lives next door to me, is very intelligent 
8. work hard and you will get good mark 
=> If you work hard, you will get good mark .
9. why don't we use less paper
 ⇒ I suggest using less paper.

#NOCOPY

1,I suggest opening the window 

2,I'd love to play volleyball ,but I have to complete an assignment  

3,We are saving money, so we want to buy a new house

4,The people, who live next door, keep having parties all nights

5,These are the keys which open the front door and back door 

6,Since it was hot, we decided to stay at home

7,The boy, who lives next door to me, is very intelligent 

8,If you work hard, you will get good mark 

9,I suggest that we should use less paper