Compléter Immigration: PrepositionsVersion en ligne Let's complete the sentences by clicking the prepositions on the right hand side. You need to start from the first sentence and work your way down, as the preposition you click will automatically go to the next available space. par Marietta Chela 1 to of to at in for after for for by 1 . Schools , kindergartens , restaurants and grocery stores are cleaned immigrants , who are often victims exploitation . 2 . According the HS article , many cleaning companies essentially base their business model on the exploitation of workers . 3 . Exploitation also means workers cleaning a grocery store six hours a day and only getting paid two . 4 . The cleaners have found work with these companies they have left the companies that exploited them . 5 . As of 2018 , there are 402 , 600 foreigners residing in Finland , which corresponds 7 . 3% of the population . 6 . Non - EU citizens must apply a residence permit before coming to Finland . 7 . You can check what kind of residence permit you need the website of the Finnish Immigration Service . 8 . Of the foreigners employed in Finland , every fifth of them ( 20% ) worked either the industry of general cleaning of buildings , restaurants and mobile food service activities or temporary employment agency activities .