Question

select the one word that makes up the complete predicate. all the recent college graduates rejoiced.

Explanation:

In a sentence, the complete predicate consists of the verb and any words that modify or complete it. In "All the recent college graduates rejoiced", the verb (and the complete predicate here as there are no other words modifying or completing the verb in terms of the predicate) is "rejoiced". The subject is "All the recent college graduates", and the predicate is the part that tells what the subject does or is, which is the verb "rejoiced" in this simple sentence.

Answer:

rejoiced