20 adverb modifying go.
21 Reading a book is a gerund phrase subject of the linking verb is. [It's the only phrase in the sentence].
22 Of the United States is an adjective phrase modifying president.
23 To get. Infinitive It's acting like a noun
24 Participial phrase modifying dog
Answer:
Atlanta was a beautiful Greek woman, she could run faster than any other human. She didn't want to marry, so she creates a challenge. The only way a man could marry her was if he bet her in a race. Hippomenes or Melanion asked help to Aphrodite, she gave him three magical golden apples. He throws the apple into her path, Atlanta slows down to pick up the apple and Melanion won the race.
Explanation: