() I tried to get on the bus this morning,but ___ I could,it had started to move.A unti B when C before D after

分类: 作业答案 • 2022-01-02 15:20:17

问题描述：

() I tried to get on the bus this morning,but ___ I could,it had started to move.
A unti B when C before D after

答

before