【单选题】听力原文:Some fuel or oil additives can be a problem for engines and fuel systems. Additives displace protective chemicals in gasoline and engine oil some may corrode fuel pumps or gas tanks, or make flex...
【简答题】___ to line n 换成n号线 ___ station 换乘站 ground ___ 地面层 at the end of the ___ 在站台的尽头 on the ___ hand side 在右手侧 Which line ___ I take? 应该坐几号线? About ___ an hour. 半个小时 You should _...