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
My best guess is C because a<span>n </span>active verb <span>is when the </span>verb<span> is clearly the subject of the sentence.</span>
This would be a simile because the author is comparing a rag doll and a snowboarder using the word "like"
The quiet car can make journeys peaceful and productive
Refusing to acknowledge something unpleasant is a way of coping with that thing. Saying something that’s unpleasant isn’t unpleasant or there, convinces them that it might make it actually go away,