I got this sentence in a form where we were given part of the sentence ("Eivätkö ___ ole sinulla?) and had to choose between "laturi, läppäri, uikkarit, and appelsiinia." From the answer, I understand that we needed to choose something nominative and plural. So the hint is in the Eivätkö ? If it were the charger I'd have to say, "Eikö laturi ole sinulla?"
Is swimwear plural in Finland? How so?
Apart from the plural question, as with others, the use of 'swimwear' is throwing me. I would use swimming suit, swim suit, bathing suit, swimming costume, swimming cossie or even swimming togs (grew up in New Zealand!) ... but never swimwear. And, of all of those, it's only "swimming togs" that uses the plural! "My swimming suit is in the car" vs " My swimming togs are in the car".
Hmm ... I suppose there is also "swimming clothes" (togs = clothes) ... which, being plural also ("My swimming clothes have got lost"), perhaps would be more apt here than "swimwear", which I agree is mostly limited in English usage to department store speak or, bizarrely, beauty pageants.