4000 Essential English Words (all books) [en-en] v2

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. Some ameliorations have been made: -Better design of the cards. -Clickable elements in the card to listen the audio. -High quality audio.