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Secondary
 Am_Eng Checkmate New Edition
Adriana del Paso, Armando David Andrade, Jose Manuel Villafuerte
Checkmate New Edition (with free Audio CD) is a three-level, full-color workbook in American English for secondary schools in Mexico. It contains a variety of exercises to practice skills, vocabulary and grammar, with a personalized Extension Activity in each lesson. The separate Answer Key for teachers contains audioscripts and quizzes.

Workbook 3Workbook 3
Workbook 3
Answer Key 1-3Answer Key 1-3
Answer Key 1-3
Audio CD 2Audio CD 2
Audio CD 2