To speed up his language learning scheme, he skipped all the words he didn't know and then would end up with no clue as to what the book was about. (Para. 3)Key idea: He couldn't understand what the book was about.

To speed up his language learning scheme, he skipped all the words he didn't know and then would end up with no clue as to what the book was about. (Para. 3) Key idea: He couldn't understand what the book was about.