用户环路是连接()与用户终端设备的传输线路，又叫用户线。
A、用户终端设备B
暂无解析
WeexpectMr.Whitewill____ClassOnewhenMissJaneretires.
Evenifhisletter____tomorrow，it____toolatetodoanything.
John'sscoreonthetestisthehighestintheclass;（）helastnight.
Itisnecessarythatthestudents____moreexcercisestodo.
Aleading___________intelligenceandoperationscompanyhasreleaseditsanalysisofworldwidereportedincidentsofpiracyandcrimeagainstmariners.
