2/ The house is cleaned by them every day.
3/ He will be awarded with a prize.
4/ The house was built by them two years ago.
5/ Exbition of paintings will be opened by them next week.
6/ The novel "War and Peace" was written by Low Tolstoy in 1869.
7/ Moscow is visited by a lot of tourists every year.
8/ In Europe Christmas is celebrated in December.
9/ The book is translated into three languages.
10/ The lost key wasn't found by him.