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2. Pragmatic markers in spoken interlanguage;Aijmer;Nordic Journal of English Studies,2004
3. University Language: A Corpus-based Study of Spoken and Written Registers;Biber,2006
4. If you look at…: lexical bundles in university teaching and textbooks;Biber;Applied Linguistics,2004
5. Cambridge Grammar of English: A Comprehensive Guide. Spoken and Written English Grammar and Usage;Carter,2006