When句型常用进行时态?求大神帮助
问题描述：
When句型常用进行时态?求大神帮助
答
54.When the policemen arrived on the scene, torn pieces of paper were everywhere______A.seen B.to be seen C.to see D.being seen这道题答案给的是B,D.being seen可以吗?When句型常用进行时态?记得采纳啊...