1.there was a man at the window
2.there is someone in the park
3.there was paint on the celling
4.the picture was on the wall near the door
5.she was sitting at the back of the class
6.he has been work in the office all morning
7.they have a house in the Alps
8.there were many people at the concert in the Albert hall
9.l saw him at the station at 3 o'clock
10. he wasn't standing at the door; he was in the corridor
11, the tall woman was standing near the window
12. my office is on the fourth floor
13. in most countries you drive on the right
14. we arrived in London very late
15 it was written on the bottle
16. where is the medicine? it is in the bottle