题目内容：
When a student said “All the classes will be finished before December 7th, and then students have exams”, the teacher didn't stop him to correct the tense mistake, but let him keep talking. What can we conclude from this activity?
AThe teacher combined listening and speaking skills.
BThe teacher focuses on fluency.
CThe teacher is doing contextualized practice.
DThe teacher is using different speaking activities.
答案解析：