The exercise was created 2017-02-25 by rebeckasmiling. Question count: 7.
Normally, all words in an exercise is used when performing the test and playing the games. You can choose to include only a subset of the words. This setting affects both the regular test, the games, and the printable tests.
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https://spellic.com/eng/exercise/singular-plural-ji-ma.7133194.html