The part of the sentence which have subject is: "Though host cities earn a great deal of money.", The part which tells what has happened to the subject is: "earn a great deal of money.", The part which says something positive about the Games is: "earn a great deal of money."
What is subject in a sentence?
The person, place, or thing doing the action in the sentence is the subject of the sentence. The sentence's topic tells us that what or who the sentence is talking about. A noun/pronoun is usually included in the simple subject, which sometimes also contain modifying words, phrases, or clauses.
The noun (person or thing) that is the subject of the sentence is referred to as the subject.
The predicate, which comes later in the sentence, provides information about the subject.
The subject of the phrase is "host cities," and the predicate "make a great...amount of money" provides information about it.
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