多项选择题
A.facial expression
B.sentence completion
C.clarification request
D.explicit correction
判断题 Learners can neither correct nor explain pre-systematic error.（）
多项选择题 Qualitative data of heuristic／synthetic research may consist of（）
判断题 To create this encouraging climate in the classroom the teacher should first of all show his/her own respect to all students as individual human beings，to diverse talents and learning styles.（）