choices.label: A B C D
choices.text: registration:diagnosis:treatment weigh:select:pay set questions:answer questions:collect test papers case filing:investigating:adjudicating
explanation: "preparing lessons" and "teaching" have a sequential order. the main body of both are teachers, while the main body of "reviewing" is students. "registration" and "diagnosis" have a sequential order, but the subjects of the two are different. the subject of "registration" is the patient, and the subject of "diagnosis" is the doctor. "weighing" and "selecting" have a sequential order, and the subjects of both are words.the order of the words is inconsistent with that in the question "setting questions" and "answering questions" have a sequential order, but the subjects of the two are different. the subject of the "setting questions" is the person who sets the questions, and the subject of "answering questions" is the examinees. "case filing" and "investigating" have a sequential order, and the subjects of the two are the same,that is the police. the subject of "adjudicating" is the judge, which is different from the previous two subjects.