【正文】 23. a tremendous surge of young people overpowered the adults in the sixties () the effect of a drastic boom of young people overcame the values of adults in 1960s 24． the barbarians took Rome () the savage people took the control eople thought were less civilized than them, so this idiom is often used in literature to refer to a shame or degradation of civilization. 25． We may resolve one by changing our view of it and another by changing our behavior. () To solve the problem of guilt, we can either change our definition of it so that we may feel better, or change what we will do to avoid sense of guilt. 26． live with myself () to be fortable with my conscience。 We should by no means abandon conscience. last likely or expected . He is the last person we would have suspected. 我們是絕不會懷疑他的。Unit 1 .......................................................................................................................................................................................................................................... 3 Ⅰ . Background information............................................................................................................................................................................................ 3 Ⅱ . Language points ........................................................................................................................................................................................................ 3 Ⅲ . Key to the exercises ............................................................................................................................................................................................... 5 Unit 2 .......................................................................................................................................................................................................................................... 8 Ⅰ . Background information............................................................................................................................................................................................ 8 Ⅱ . Language points ........................................................................................................................................................................................................ 9 Ⅲ . Key to the exercises ................................................................................................................................................................................................ 11 Unit 3 ........................................................................................................................................................................................................................................ 14 Ⅰ . Background information.......................................................................................................................................................................................... 14 Ⅱ . Language points ...................................................................................................................................................................................................... 15 Ⅲ . Key to the exercises ................................................................................................................................................................................................ 17 unit 4 ......................................................................................................................................................................................................................................... 20 Ⅰ . Background information.......................................................................................................................................................................................... 20 Ⅱ . Language points ...................................................................................................................................................................................................... 24 Ⅲ . Key to the exercises ................................................................................................................................................................................................ 25 Unit 5 ........................................................................................................................................................................................................................................ 27 Ⅰ . Background information.......................................................................................................................................................................................... 27 Ⅱ . Language points ...................................................................................................................................................................................................... 29 Ⅲ . Key to the exercises ................................................................................................................................................................................................ 31 Unit 6 ........................................................................................................................................................................................................................................ 33 Ⅰ . Background information.......................................................................................................................................................................................... 33 Ⅱ . Language points ........................................................................................................................................