Помогите с английским!!!

1) We wrote a grammar test on Wednesday.
2) The test was written on Wednesday.
3) This building was built two years ago.
4) Ann's parents allowed her to babysit.
5) Ann was allowed to babysit.
6) Nick managed to make an English project.
7) The project was made a long time ago.
8) I bought this pair of jeans last weekend.
9) This pair of jeans was bought last weekend.
10) Her phone call wasn't answered.
11) Nobody answered her phone call.