61.  The one is preparing for the course before the class, studying efficiently in the course, and doing the homework.

62.  In reality, my English is poor before.

63.  I haven't learnt English two years before I am a graduate student.

64.  Before coming to the conclusion, we had better look back on the origin of the issue which dates back from the early history of human beings.

65.  As a rule , I have to finish my thesis before graduation .

66.  Before looking to the bright future , turning back your head to reflect on the past is necessary.

67.  The interval time of the new plan is the same as before, in this case, I can accomplish the goal of reciting the book of the New Concept English 3 before this semester is over.

68.  However, the present situation already differed from the before, I should read plenty of academic paper in English to get more information in my research field.

69.  Reading , I should reading more books more carefully than before .

70.  So, I have to make adequate preparation before class, so that I can catch the teacher's words well in the class and understand better.