What are the two speakers mainly talking about?（ ）
A、Thespecialtyofanappliedlinguist.
B、Thedefinitionofsecondlanguageacquisition.
C、Thecausesofsecondlanguagelearningdifficulty.
D、Thelanguagecompetenceofchildrenandadults.
发布时间：2025-11-06 16:06:26
