stinac on "Exam questions that I've never seen in Becker&wiley."

I took the exam 2 days ago, and i still felt frustrated cuz i saw so many questions that I've NEVER seen in my becker or wiley test bank.
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I searched some after exams and found the answers by Google, just wondering if I have to reprepare for it which it's obvious,：(, do I need to buy more materials? Wiley materials are so TOO much and Beckers are so under value for exams....