问题描述:
When we returned from our holidays,we found everything______.What______while we had been away?
A.changed;had happened B.changing;happened;
C.had changed;has happened D.was changing;happened
为什么第二空不能选has happened
A.changed;had happened B.changing;happened;
C.had changed;has happened D.was changing;happened
为什么第二空不能选has happened
问题解答:
我来补答展开全文阅读