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II. Complete the sentence with the correct preposition in, on or at.
1. I've got a computer __________ my bedroom.
2. Do you live __________ a house or an apartment?
3. He is sitting __________ a sofa __________ the corner of the sitting room.
4. There is such a mess __________ the kitchen!
5. The dog is sleeping __________ the carpet.
6. We live __________ the 3rd floor __________ 53 Pine Street __________ London.
7. Jane is waiting for a bus __________ the bus stop.
8. Are there any pictures __________ the walls __________ the living room?
9. We are staying __________ the Roosevelt Hotel __________ New York City.
10. My camera is __________ a box __________ the bedroom closet.

III. Complete the sentences with There is or There are.
1. __________ thirty-five students in my class.
2. __________ nice posters in our classroom.