41. In the late 1700s, for whom were clocks built in the squares of European towns?(A) The citizens. (B) The officials. (C) The visitors. (D) The workers.

50. What does the author imply about Henry’s new device in the last sentence?(A) Insomniacs will sleep soundly with the new device.(B) Snorers may feel uncomfortable wearing the new device.(C) Miracles of sleep will naturally come about with the new device.(D) Henry has never had any problem sleeping after using the new device.