Second-hand bookstores near the school can also visit more and find cheap exercises for Band 4 and Band 6. Be sure to do more and read more.
Listen to English every morning or when you have time. I suggest listening to new concepts, first listening, then reading and then reciting. Sticking to reading and listening to spoken English is not a problem.
Believe in yourself, stick to it and you will definitely make progress.
The most important thing in college is to learn the ability of self-study.