because you don’t quite know enough material, that just means you need to study a bit more and take the exam again. but, please don’t fail the exam because you miss seeing the word “not” or " instead of."
when you read questions in studying or for real on the exam, you need to focus carefully on what it actually says. my students here at the university will complain after every test about reading what they thought a question was asking and not what it really did say. “i knew the answer; i just read it wrong.” unfortunately, either way you wind up with a miss.
when you read a question, either 