31.（ ）

(单选题)What is the author’s attitude toward the practice of San Fra (单选题)The author believes that the current opposition to sharing e (单选题)By “have a half point” in Paragraph 4, the author probably m (单选题)Opponents complain that the taxi and room-rental businesses (单选题)According to Paragraph 1, the success of the “sharing econom (单选题)What do we know from the passage? (单选题)According to the last paragraph, how can we stop bacteria? (单选题)It was found that the restrooms had more bacteria when _____ (单选题)What is Paragraph 3 mainly about? (单选题)How would most people describe jet hand dryers?