Question

【题目】There were many talented actors out there just waiting (discover).

Answer 1

【答案】to be discovered
【解析】句意：还有很多有才能的演员等待被发掘。to be discovered作talented actors 的定语，表示尚未被发掘。discover与talented actors 之间是被动关系。由此可知答案为to be discovered。