دوستان گلم این دو تا کتاب گرامر بسیار عالی هستند و کاملا جزئیات رو توضیح دادند از دست ندید ازاینجا دانلود کنید
The books provide intermediate learners with a wealth of interesting and lively practice material, concentrating on the areas of grammar which generally cause most difficulty.
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