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My dear
I've acknowledged that you are under terrible pressure because of your English grades.Here are my suggestions for you:
First of all,you should recite more new words.What we all know is that words make up the sentences.So enriching your vocabulary is very important.
Secendly,you should read the texts over and over.According to the guidance of the reference books,you will learn lots of the grammar from the texts since the reference books can analyze the texts well.
Last but not the least,listening the tape is also good way to improve your English.
All mectioned above come from my own experiece,I hope they can help you.
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