How can I improve from an IELTS band score of 6.0 to 7.0?

I am a student in an English preparatory class at a university. My university's proficiency exam is very challenging and I could not pass such exam. . That's why I decided to prepare for ielts. Most students at my university pass the preparation with IELTS. 2 months ago, I recieved the exam so that I can try myself. I have 6.0 overall (academic). R: 5.5 L: 5.5 W: 6.5 S: 6.5

However, I am required to achieve an overall score of 6.5 to pass the English preparatory class. I do not know how I can boost my score.

With more pratice, I can improve my Listening score but I do not have any idea how I can cope with Reading problem.

Do you have any recommendations concerning this circumstance?

How can I improve from an IELTS band score of 6.0 to 7.0?
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