Viết lại câu: Nick sneezed so much because of the dirty air. Volunteers have given out food and blankets to homeless people

1,Nick sneezed so much because of the dirty air.
The dirty air made...........................................
2,There are a lot of trees .The air clean. 
If........................................................................
3,Volunteers have given out food and blankets to homeless people.
Food and blankets............................................ 
4,Most people left before the volcano erupted.
After................................................................. 
5,There is so much light in the city at night, so we can't see the stars clearly.
If....................................................................
6,Because the water is polluted, the fish are dead.(viết lại câu dùng due to)
.........................................................................
7, Everyone litters, so the environment is polluted (nối dùng because) 
......................................................................
8,What had you done before going to bed last night.(trả lời câu hỏi) 
.....................................................................