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Ответ:

2. There is somebody at the door.

3. It was so dark that I couldn't see anything.

4. I'm thirsty. I want something to drink.

5. Did somebody phone me while i was out?

6. Did he travel somewhere last year?

7. We didn't know anybody at the party.

8. Somebody wants to talk to you.

9. She can't do anything without his help.

10. Let's go anywhere together next Saturday.