Ответ:
1)at 2)in 3)On 4.on 5. 6.at 7. 8.at 9.at 10.at 11.on 12 at 13.in 14on 15in 16 at, in 17.on 18.at 19 at 20 on, at, in
To avoid stress
To share a room
To search for information
To understand each other
To miss friends
To attend school
To believe your own eyes
To escape problems
Salad
Soup,potato soup,vegetable,cabbage soup,fish soup,broths
Stewed meat,roast chicken,turkey
1 has done
2 have found
3 has sent
4 have tried
5 have eaten
6 has bought
7 have started
8 has broken
9 have lost
10 has taken
2 exercises
1 just
2 already
3 since
4 ago
5 yet
6 since
3exercises
1 We love Moscow because we have come back.
2 The appeared a new book by English