1. Unit 3 Development of language skills: Oral comprehension and expression. Written comprehension and expression. Communicative competence in English. by David Pérez Salgado
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4. Skills needed to master a language The four skills can be classified as follows: Jeremy Harmer Council of Europe 1970 Threshold Levels Writting Speaking PRODUCTIVE Reading comprehension Listening comprehension RECEPTIVE WRITTEN ORAL SKILL MEDIUM