Ответ:

1. Were you at the party two days ago?

No, I won't.

2. Were the shops open last Sunday?

Yes, they were.

3. Was Sam at the museum last week?

Yes, he was.

4. Were they at the sports centre last Monday?

No, they won't.

5. Were Sally and her sister sick yesterday?

Yes, they were.

6. Was the weather cold and wet last Tuesday?

No, it wasn't.

7. Was Jane in London last year?

Yes, she was.