8Auerbach,E.R.Reexaming English Only in the ESL Classroom[J].TESOL Quarterly 1993,27:9-32.
9Bergman,P.Att undervisa pa tva sprak[A].In Tvasprakighet I skolan/Bilinguals at School(BAS-rapport)[C].Stockholm:Centre for Research on Bilingualism.1993,51-108.
10Bright,J.and G.McGregor.Teaching English as a Second Language:Theory and Techniques for the Secondary Stage[M].London:Longman,1970.