On the last day of military training, a class of students carried out live fire, and several instructors talked about the shooting results of Class one. Instructor Zhang said that the time of this military training is too short, and no one in this class will have excellent shooting results. Instructor Sun said: No way, there are a few people who have trained before, so their shooting results to be excellent. Instructor Zhou said: I think the monitor or the sports committee can do well.
It can be inferred that the shooting performance of sports committee members is not excellent because only one of the three instructors is right.

