Перевести предложения в Passive
1. They went home after they had finished the work.
2. Our friends are making preparations to meet them.
3. He wondered why we had not visited him before

he felt better when he had reached the post office, bought a registered envelope and posted the letter

1.After the work had been finished by them they went. 2.Preparations are being made by our friends to meet them. 3.He wondered why he hadn't been visited by us before.