11.The German didn’t  build this factory during the Second World War.…………………………………………
12.The Greens are going to paint this house  and these cars for Christmas Day.……………………………………
13.Ann had fed the cats before she went to the cinema.……………………………………
14.The students have discussed the pollution problems since last week.………………………………………
15.Have the thieves stolen the most valuable painting in the national museum?……………………………
16.Some people will interview the new president on TV.……………………………
17.How many languages do they speak in Canada?……………………………………………
18.Are you going to repair those shoes?………………………………………
19.He has broken his nose in a football match.………………………………………
20.Have you finished the above sentences?………………………………………