Grandma Bates came to stay because

полы моют(ся)- я бы так перевела

-our organise wants to   protect the environment.

-we fight against water and air    pollute

-are you unhappy with the ecological situate  in your region?  

-send us some inform about it and we`ll try to help. 

стартовать значить наать;

1. she wasn't invited to the party (by them).

2. the windows weren't left open (by me).

3. the light wasn't turned off (by them).

4. some friends has been invited to tea (by me).

5. an english book has been given to me (by her).

6. has the letter been written yet?

7. a lot of interesting things have been told to us (by them).