Ответы и объяснения

1. Millions of Christmas greetings is sent by e-mails by them.
2. This newspaper is read by him.
3. The window was broken by the wind.
4. An e-mail was got by Lena next week.
5. Some money was made by him in three months.
6. His backpack is being packed by somebody at the moment.
7. A cake has already been made by her.
8. The dog hasn't been walked by them yet.