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на контрольной

on a test

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phrase Rare #35,364
on a test Refers to being during or in the context of a written test or classroom assessment. Контрольная is a feminine noun meaning a test or written examination.
RU: Я забыл ручку на контрольной.
EN: I forgot my pen during the test.

Том жульничал на контрольной.

Tom cheated on the test.

Том списывал на контрольной.

Tom cheated on the test.

Том сделал много ошибок на контрольной.

Tom made a lot of mistakes on the test.

Я никогда не списывал на контрольной.

I have never cheated on a test.