The girl had a short rest____she arrived home.A.after B.when C.before D.since为什么不能选before啊?

The girl had a short rest____she arrived home.A.after B.when C.before D.since为什么不能选before啊?
The girl had a short rest____she arrived home.A.after B.when C.before D.since
为什么不能选before啊?

The girl had a short rest____she arrived home.A.after B.when C.before D.since为什么不能选before啊?
很高兴能够在这里回答你的问题,这道题的正确答案应该为：
如果用 before,前面就要用过去完成时
而前面是一般过去时