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1. When you come ... the classroom, you can see rows ... desks and a teachers table.
2. There are flowers ... the pots ... the window sills.
3. We go ... college five days of a week.
4. ... 7 o'clock exactly my alarm clock wakes me up.
5. ... Thursdays we have an additional class ... Computer Science.
6. Alexander leaves ... the college and goes ... home ... bus.
7. The teacher writes ... the board and we make notes ... our exercise books.
8. ... seminars you have to speak ... the class.
9. ... the college you can find a big garden.
10. ... our reading room the students can take any book ... the shelf and work ... it ... the desk.
11. I dont see a desk ... the room. - Its built ... the bookcase. When you pull this drawer, it turns into a desk.
12. ... the hall there are laboratories ... monitoring equipment.
13. The teachers table is next to the window.
14. ... the middle ... the room there is a glass table with documents displayed ... the glass.
15. The ideal place ... a flat-screen TV ... my living room is the fireplace.

Вместо ... нужно подставить:
for,by,in (7),on (3),into (2),to,from,over,at (3),of (3),in front of,under,behind,next to,with (2), across