What is the passage mainly about?

(单选题)—Terribly sorry, but I thought this was a parking lot.—_____ (单选题)Which of the followings is not the suggestion that the exper (单选题)The researchers have pointed out that ______ are at a higher (单选题)The statements about these three studies below are correct e (单选题)The key topic discussed in this passage is ______. (单选题)According to the first paragraph, American customers spend a (单选题)After talking with AI’s adult son, what does the author thin (单选题)What property did AI leave for his son? (单选题)The reality hit AI so badly and made him start to be addicte (单选题)After AI’s son died, what happened to AI’s family?