Chuyển sang câu bị động không ngôi

Chuyển sang câu bị động không ngôi:
1.People thought that Mr Ba was at home yesterday
-It
-Mr Ba
2.People say that he is famous teacher
-It
-He
3.They comsider that she was sick last night
-It
-She
4.Everyone said that we sold that house
-It
-We
5.People think that they buy lot of cats
-It
-They