During their teaching practice, the students had to visit some l

During their teaching practice, the students had to visit some local schools for the （） of lessons in progress.
A、observation
B、operation
C、objection
D、organization
【正确答案】：A
【题目解析】：本题考查名词辨析。observation：观察。operation：操作，经营。objection：反对。organization：组织，机构。句意：在他们的教学实践中，学生们必须访问一些当地学校，以观察正在进行的课程。