单项选择题 M: Our plane has been circling for a long time. Why the delay?W: The airport was closed for a while this morning and things still are not back to normal.Q: What does the woman mean?（）

单项选择题 M: Do you think you feel energetic enough to walk to our study group session tonight?W: If there is one! I guess you haven’t heard the weather reports. Over a foot of snow is expected for this evening.Q: What does the woman imply?（）

未知题型 （ ）是重要的教育资源，同样也是班级管理的资源。