The thing which a teacher is most likely to reveal when talking about an upcoming test is B. What question formats will be on the test.
This refers to the formal coming together of people to discuss a particular point.
Hence, we can see that based on the given narration about the meeting between a teacher about an upcoming test, the thing which he is most likely to reveal is the question formats that will be on the test.
Read more about meetings here:
https://brainly.com/question/7718336
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