A long line with a camera ______to it was put into the dolphin's stomach to find out where the plastic ball it ate was.A.attached B.attaching C.to attach D.having attached

A long line with a camera ______to it was put into the dolphin's stomach to find out where the plastic ball it ate was.A.attached B.attaching C.to attach D.having attached
A long line with a camera ______to it was put into the dolphin's stomach to find out where the plastic ball it ate was.A.attached B.attaching C.to attach D.having attached

A long line with a camera ______to it was put into the dolphin's stomach to find out where the plastic ball it ate was.A.attached B.attaching C.to attach D.having attached
A long line was put into the dolphin's stomach to find out where the plastic ball was.
with a camera attached to it 修饰a long line
it ate 修饰 the plastic ball
绑在相机上的长线被放进海豚的胃中,为了发现它吃下的塑料球的位置
所以选A

A 过去分词表被动 被系在。。。

with a camera attached 一根（套着照相机的）长线被放进了海豚的胃里 为了发现它吞下的橡胶球在什么位置。（套着照相机的）长线 attached做定语修饰long line