Multiple choice

Did you -------- the answer?

  1. knew

  2. had know

  3. know

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The auxiliary verb 'did' indicates past tense and requires the base form of the main verb. 'Knew' is past tense (incorrect after 'did'), 'had know' is grammatically invalid, and 'know' is the correct base form. In questions, the structure is 'did + subject + base verb'.

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