engineering for sustainable雅思听力答案 1、utility bill [填空题]* ___(答案:水电费) 2、courtyard [填空题]* ___(答案:庭院) 3、armchair [填空题]* ___(答案:扶手椅) 4、stereo system [填空题]* ___(答案:立体声) 5、refrigerator [填空题]* ___(...