1. Modality in advanced Swedish learners' written interlanguage;Aijmer,2002
2. Arab ESL learners and modals;Bensaid;Arab World Eng. J.,2016
3. The Longman grammar of spoken and written English;Biber;TESOL Q.,1999
4. Code-mixing and simultaneous interpretation training;Cheung;Interpreters’ Newsl.,2001
5. Does accent matter? The impact of accent in simultaneous interpretation into mandarin and Cantonese on perceived performance quality and listener satisfaction level,;Cheung,2003