вставьте а(аn)там, где это возможно. В остальных случаях вставьте some.
1...room,2...question.3....nut,4....orange,5...juice,6orange juice,7...sandwich,8cheese,9cheese sandwich,10...ham,11...hamsandwich,12...exercise,13...wolf,14...hen,15...house,16...milk,17...soup,18...milk soup,19...tomato,20...tomato soup,21...salad,22...potato,23...potato salad,24...fridge,25...plan,26...idea,27...sugar,28...jar,29...honey,30...porridge,31...family,32...families,33...countries,34...puppies,35...cities,36...corn,37...apple,38...apples,39...apple jam,40...snow,41...snowball,42...snowmen,43...snowman,44...postman,45...postmen.