Ответ:
1 Kostas asked me if I'd ever been to Athens.
2 I would never have realized it was Thomas you'd told me about.
3 You haven't really enjoyed much this holiday.
4 *Are there any biscuits in the cupboard?' 'No, there are not.
5 Pizza which is popular all over the world originally came from Italy.
6 My sister might still get the job in London - we won't know until next week.
7 Dan drinks coffee, doesn't he?
8 Edinburgh is the city where the Harry Potter novels were written.
9 Wait until Dave arrives, and then we can all go together.
10 Oh, no! That's the man whose car I crashed into last month!