---It's getting dark．Could you please_____ the light for me？
---All right．Just a minute．
A．keep on B．turn on C．try on D．put on
---It's getting dark．Could you please_____ the light for me？
---All right．Just a minute．
A．keep on B．turn on C．try on D．put on
答案：B keep on 继续做某事，反复做某事； try on 试穿； put on穿上； turn on打开（水、电视、收音机、灯、煤气等）；根据句子"It's gettting dark．天黑了．"结合下文"…the light for me"可以用推断出"请对方为我开灯"，考查词组turn on the light开灯，故选：B．