Final answer:
The correct form of the word to complete the sentence is 'more prepared.' Comparative adjectives are used to compare two things, in this case, taking notes before a test and not taking notes.
Step-by-step explanation:
The correct form of the word to complete the sentence is more prepared.
Comparative adjectives are used to compare two things, and in this sentence, we are comparing taking notes before a test with not taking notes. The comparative form of the adjective 'prepared' is 'more prepared'.
For example: 'When we take notes before a test, we make ourselves more prepared than if we had not taken notes.'
Learn more about Comparative adjectives