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http://grammar.ccc.commnet.edu/grammar/quiz_list.htm

http://www.gingersoftware.com/grammarcheck#.U98KhJSSwlR

http://hocmienphi24h.vn/?p=104

http://www.englishdaily626.com/conjunctions.php?026

http://www.bristol.ac.uk/arts/exercises/grammar/grammar_tutorial/page_49.htm

http://www.grammar-quizzes.com/sent-clauses.html#commis

http://anh-ngu-cho-nguoi-viet.blogspot.com/2012/01/conjunction-verb-lien-tu.html

http://msthuthuy.wordpress.com/2013/08/24/10-adverb-clause-kinds-of-adverb-clauses/

http://msthuthuy.wordpress.com/2013/08/09/8-noun-clause-question-clause/#more-678

http://www.learnenglish-online.com/writing/tests/runonsentences.html

http://www.onlinecorrection.com/

http://englishteststore.net/index.php?option=com_content&view=article&id=4321:english-grammar-the-same-meaning-sentence-test-001&catid=139:the-same-meaning-sentences&Itemid=388

http://www.buowl.boun.edu.tr/

http://www.buowl.boun.edu.tr/students/Paragraph%20Writing%20Exercises.htm

http://writingcenter.unc.edu/handouts/paragraphs/

http://english-zone.com/writing/para-strctr.html

http://www.uefap.com/writing/parag/parafram.htm

http://www.uefap.com/writing/writfram.htm

http://www.victoria.ac.nz/llc/llc_resources/academic-writing/index.html

http://www.buowl.boun.edu.tr/students/fwriting%20program%20for%20students.htm

http://www.buowl.boun.edu.tr/students/Paragraph%20Writing%20Exercises.htm#Faulty_Start

http://college.cengage.com/devenglish/wong/paragraph_essentials/1e/students/exercises/

http://el19online.ait.ac.th/essaystructure/essaystructure3.html

http://el19online.ait.ac.th/essaystructure/essaystructure2.htm

http://grammar.ccc.commnet.edu/GRAMMAR/index2.htm

https://sites.google.com/site/dangquangdiem/hi-you-are-welcome

https://www.facebook.com/diep.do.1460/photos_all

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http://bstudent.net/

https://www.facebook.com/DeThiToeicmienphi

https://www.facebook.com/IELTStaidanang?fref=ts

http://vuonghuuvinh.net/?HOME/VN/

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http://www.tienganh.com.vn/archive/index.php/f-78.html

http://clgtvt1.blogspot.com/2013/10/longman-new-real-toeic-full-actual-test-rc-lc-full-ebook-audio.html

http://www.tienganh.com.vn/printthread.php?t=66756&pp=10