4000 Essential English Words Volumes 1-6 (Audio & Books)

4000 Essential English Words is a six-book series that is designed to focus on practical high-frequency words to enhance the vocabulary of learners from high beginning to advance levels. The series presents a variety of words that cover a large percentage of the words that can be found in many spoken or written texts. Thus, after mastering these target words, learners will be able to fully understand vocabulary items when they encounter them in written and spoken form.
Each unit presents 20 words which are defined and used in sample sentences. The activities in the books are designed to present the words in

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