At the gate of the temple, I saw a signwhichwas read, “No photograph.” A B C DD was read--

At the gate of the temple, I saw a signwhichwas read, “No photograph.”
A B C DD was read---read

(答案→)D was read---read 解析：这是固定用法，意思是：上面写着，一般不用被动形式。

谢谢了