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Knowledge gained in each chapter itself. Know the structure of the sentence A vocabulary that is familiar. Distinguish the sentence Each chapter is a learning difficulty that varies in each chapter
the knowledge gained in each chapter,.it has to know the structure of the sentence have no vocabulary to rummage, have ever seen a difference sentence. learn in each the difficulty varies in each chapter.

The knowledge gained in each chapter, it has to know the structure of the sentence have no vocabulary to rummage, have ever seen a difference sentence. Learn in each chapter will be the difficulty varies in each chapter.
The knowledge gained in each chapter, it has to know the structure of the sentence have no vocabulary to rummage, have ever seen a difference sentence. Learn in each the difficulty varies in each chapter

The knowledge that has been learned in each chapter นั้้น structure of a sentence is not a word that has been รู้้ chickens had ever seen the difference between the sentence in each chapter, there will be a difficulty vary in each chapter
The knowledge gained in each chapter,It has to know the structure of the sentence have no vocabulary to rummage, have ever seen a difference sentence. Learn in each the difficulty varies in each chapter