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Ortega,Lourdes. "Planning and focus on form in L2 oral performance."Studies in SecondLanguage Acquisition21.1 (1999):108-148 Kuiken,Fuiken."Task complexity and second language learning."International Journalof Applied Linguistics2(2007):272-275. Wesche, Marjories,and T. Sima Paribakht."Assessing...