The traval industry has been at the _____of technology for a long time. (A)forecast (B)foregone (C)forerunner (D)forefront解釋并翻譯，謝謝
熱心網友
at the forefront of sth在....的最前方..選D在很長的一段時期里,旅游產業已處于科技的最前方.
The traval industry has been at the _____of technology for a long time. (A)forecast (B)foregone (C)forerunner (D)forefront解釋并翻譯，謝謝
at the forefront of sth在....的最前方..選D在很長的一段時期里,旅游產業已處于科技的最前方.