[1] Washington Univ, Washington, DC 98105 USA
[2] Univ Arkansas, Spanish Language & Linguistics, Spanish, Little Rock, AR 72204 USA
[3] Northeast Normal Univ, English & English Linguist, Changchun, Jilin, Peoples R China
[4] Washington Univ, Spanish & Appl Linguist, Appl Linguist, St Louis, MO 63130 USA
[5] Norman Bethune Univ Med Sci, ESP, Changchun, Jilin, Peoples R China
[6] Changchun Taxat Coll, ESP, Changchun, Jilin, Peoples R China