Tom has been in the factory _____ he left school.A.when B.since C.as soon as D.whether请简略说明理由,

分类: 作业答案 • 2022-08-08 11:26:47

问题描述：

Tom has been in the factory _____ he left school.
A.when B.since C.as soon as D.whether
请简略说明理由,

答