Once a student is found____in the classroom,he or she will be punished.

问题描述:

Once a student is found____in the classroom,he or she will be punished.
如题A.smoking B.to smoke C.smoke 选A原因.

Once a student is found____in the classroom,he or she will be punished.
【sb is found doing sth】某人被发现做...
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