The sentence is False. Using your friend’s list of key topics that might be on an open book test is not enough for the preparation for the test. This kind of test are tricky most of the times, the teacher knows that you can use your source so it won’t be as simple as memorize concepts, he will demand you to understand them more than recall and retain them. The best way to study for them is making notes of the topics and comparing them with your classmates, in order to not lose time during the texts searching for the right information for the answer. You also should organize your material, another good tip to save time, highlight the important lines, and what is very useful, make mind maps and summaries just to know exactly where to find the right information during your test.