答案及解析：[单选题]While-listening activities are designed for students to identify what’s important in a passage, ( ) - 教育教学网课答案- 答案窝(daanwo.com)-大学生作业答案及考资分享平台

问题：

[单选题]While-listening activities are designed for students to identify what’s important in a passage, ( ),( ), and ( ).
Astimulate students’ background knowledge about the topic
Bperceive the text structure
Ckeep themselves concentrated throughout the passage
Dshow their understanding or non-understanding of the passage