来自陈彦桥的问题
when____by,Isawthemplayingbasketballontheplayground这里的横线上应该填passing还是passed
when____by,Isawthemplayingbasketballontheplayground
这里的横线上应该填passing还是passed


when____by,Isawthemplayingbasketballontheplayground这里的横线上应该填passing还是passed
when____by,Isawthemplayingbasketballontheplayground
这里的横线上应该填passing还是passed
passingwhen(Iwere)passingby