Ответ:
1) Where are you going to see the New Year in? / Where are you going to celebrate the New Year? - I think that at the Petrovs', but I'm not quite sure yet.
2) - You haven't been to our country cottage since last year and haven't seen our garden yet. Come and see it.
- With pleasure. Can I take my eldest son with me?
- Of course, we will be glad to see him. I am sure that he will like our garden.
3) Does the lecture really begin at 1 o'clock? Yes, don't be late.
4) I am sorry, I haven't introduced you to my wife yet.
5) Can any of the guests play the grand piano? Let's dance, shall we?
6) I have not seen you for ages, but you look as young as 10 years ago.
7) If you decide to go to the exhibition today, call us. We'll join you with pleasure.
8) Why don't you put on his coat? It's rather cold today.
- When we left the house in the morning, there was no rain, the sun was shining, and it was quite warm.
9) We can no longer wait for Smirnov. It's late, and it will be difficult to get home.
10) Your elder brother promised to come at six sharp. I wonder if he will keep his promise?
11) "Have you really changed your mind?" he said, interrupting us.