Помогите срочно, надобно сделать 5 и 6 упражнение, пожалуйста, в 5

5
1 All the books have been read by him
2 The house has been cleaned by them
3 The test has been written by us
4 Breakfast has been eaten by them
5 The key has been lost by him
6 Have the strawberries been eaten by the children?

6 
1 the desks have been washed by Sasha
2 the flowers have been watered by Ann
3 The floor has been mopped up by Tanya
4 The furniture has been dusted by Peter
5 The grass has been cut by Misha
6 The trees have been cut down by John