What is the main purpose of the passage?

(单选题)Which of the following contributes to long waits at major ai (单选题)The crash of Egypt Air Flight 804 is mentioned to . (单选题)If the passage continues, what would the author most likely (单选题)According to the study by the World Bank in 1974, economic g (单选题)Before the 1970s, most development policies were based on th (单选题)What do we learn from the first paragraph about the relation (单选题)What does the author mainly want to tell readers in the last (单选题)How did the writer feel halfway with the novel? (单选题)The author decided to write a novel ______ . (单选题)What does the underlined part in Paragraph 1 mean?