(Watch the video 00:00-05:45) In the introduction stage, the teacher set up a real situation to guide students to solve problems by depicting the route from the school to the provincial museum. What are the values of doing so? 
A、It can arouse students' curiosity to solve problems.
B、It can stimulate students' content schema.
C、It can pave the way for the later tasks, i.e., marking the map and talking about the route after listening。
D、It can pave way for sharing ideas in groups and later presenting ideas in class.