This treatment may be useful but we don't know until we've _______ it to the test.

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English Grammar Intermediate Level (B1) Practice Test — practice the complete quiz, review flashcards, or try a random question.

Intermediate B1: Ability to make simple conversations about familiar topics. At B1 level, you can describe experiences, events, and deal with many situations while traveling.


This treatment may be useful but we don't know until we've _______ it to the test.