This group of students is used as subject predicate, singular or plural? How to judge the consistency of subject and predicate?

In the singular
But if the students of this group is the subject, the predicate should be plural,
The judgment of subject predicate agreement depends on the noun or pronoun as the subject. For example, it depends on the head word. The head word of this group of students is group, if the head word of the students of this group is the students
I hope you can understand

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