Answer:
15. Have you ever been to Oregon?
(Turn into a statement --> You have ever been to Oregon)
16. The plane crashed on July 1, 1952.
17. My neighbors n saw the moving van.
18. Some loud sirens were also heard.
19. The music could be heard two blocks away.
20. This area of the country is dry and barren.
Step-by-step explanation:
Verbs show the the action that the subject is doing. The bolded words are verbs, as they are the action. Subjects are the thing or person doing the action. Subjects can be a person, place, thing , or idea.