Answer:
To prepare for the test, Andrew took notes and studied.
Explanation:
This is called verb agreement.
In the context, the sentence given is "To prepare for the test, Andrew takes notes and studied." The correct form of verb in the sentence would be
" To prepare for the test, Andrew took notes and studied."
This sentence shows the action had started in the past and completed in the past itself. It means that Andrew already took down the notes and studied for the test.
