The grading standard of EF English test varies from A-H. The higher the level, the higher the English ability, but it can't objectively show the level of the evaluator.

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Acaso's foreign teachers are all certified, and the qualifications of each foreign teacher can be found in official website, with a relatively pure accent. After registration, you can choose your own teacher. If you are not satisfied, you can change teachers until you are satisfied. If nothing else, our courses are absolutely cost-effective. If we don't spend 20 yuan, we can have our own exclusive foreign teachers.

If you don't know how to choose an English institution, you can consult "acaso vivi teacher" in Baidu.

If you want to download free English resources, you can search "acaso official website Forum" in Baidu.