Be sure to follow any instructions
regarding how you should prepare for your exam (such as fasting for a certain amount of time,
drinking enough water, and avoiding caffeine or strenuous exercise).
Regarding your concluding statement, «You can lead a horse to
water but you can't make it
drink»: I guess there aren't many horses out there who think that they are thirsty
enough to
drink from the fountain of knowledge yet, even though it is staring them right in the face.