The Arctic Ocean: walruses, bowheads, the 400-year shark and the unicorn's tooth

The 16 questions of lesson 169 «The Arctic Ocean: walruses, bowheads, the 400-year shark and the unicorn's tooth» of the biology course of Mova's primary school with their options, 82 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: the lesson at school.

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