The good scores of exams a right attitude of study. If one has a right attitude of study, he good results.
A. focus on, will get
B. are based on，will achieve
C. establish , receives
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解析：focus on集中于；are based on基于；establish建立，安置。句意：考试的好成绩基于正确的学习态度。如果一个人有一个正确的学习态度，他就会取得好成绩。结合语境可知下文描述的是将来的动作，故用一般将来时态。选B。