I was just going to cut my rose bushes but someone _______ it. Was it you?

A．has done

B．had done

C．would do

D．was doing

油水舱检修完毕后，应（）。

①检查舱内是否清洁干净；②是否有遗漏工具；③封人孔盖时确保舱内无人；④保证人孔盖水密。

A．①②③对

B．②③④对

C．①③④对

D．①②③④对