According to the author, the book aims to work with prepositions, Present Simple / Continuous, Irregular Past, Present / Past Perfect. Each topic has a story containing examples of practicing the grammatical structures, as well as a very complete set of instructions for teachers.
Download: http://huyhuu.com/news/6321/Grammar-Zappers
Download: http://huyhuu.com/news/6321/Grammar-Zappers
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