Instead of trying to learn everything, you should focus on all of the following except:
a. the study questions.
b. notes in the book from a previous user.
c. notes on the board.
d. the class review session.

i think its d.

hope it you!

can you finish the question hun

b is the answer.   i sat on the lumpy sofa, totally exhausted, with a bad taste in my mouth, wondering what i should do next.  

specific audience will understand the main ideas. for example, if you were writing an instruction manual for rocket scientists, it would likely look very different from one you would write for young children. your language, tone, and writing style would change significantly.