She returned to her 12th birthday bcuz she thinks it was unimportant. While she was reliving this she realized that all humans are blind. She realized that she took life for granted and did not appreciate the little things. She did not appreciate what she had until she had lost it. In the beginning the other dead people had warned her not to return to the land of the living but she still did it. When she returned she told them "I should have listened to you. That's all human beings are. Just blind people. Thornton wilder is trying to get the readers to appreciate the small things because later on they become things you regret that you did not appreciate.
hope this helps :)
Answer:
The casino has been closed by the authorities
the results of teh match will be announced by them
new schools is being built by the government
English is being spoken in class by the students
the bike is stolen by the thief
the dinner was made by him
it is a verb and it means to disapprove in an argument
The fact that he found the blue carbuncle