21. That price of music sounds quite familiar. Who _________the piano upstairs? (A)has played (B)played (C)plays (D)is playing

73. Which of the following can be a reason for the popularity of Lomborg’s books? (A)Some big businesses intend to protect their own interests. (B)The book challenges views about the fine state of the wirld. (C)The author convinces people to speak comforting worldviews. (D)Industry–funded media present confusing information.