Какие трудности для хода Северной войны создавали выступление К. А. Булавина, измена И. С. Мазепы?

1. They say they have lunch at the Institute.
2. He says his parents live in Kiev.
 3. She says she entered the Institute three years ago.
 4. Mary says she can describe the place to me as she knows it very well.
 5. John says he'll meet his parents at the station.
 6. The teacher says we know this lesson. 

1. I wonder why they stop their work at one o'clock.
2. I wonder how many students there are at Moscow University.
3. I wonder what questions they discussed at their meeting.
4. I wonder where he heard the news.
5. I wonder when he will  leave for Leningrad.
6. I wonder what she spoke about at the meeting.
7. I wonder how many students will be present at the conference.
8. I wonder how long  he stayed there.
9. I wonder how  she described the place to them.
10. I wonder who teaches them English.