【题目】 carefully for long time,the opening ceremony won a great success.
A. Having prepared B. To be prepared C. Being prepared D. Having been prepared
在线课程【答案】D
【解析】考查非谓语性动词作状语。prepare的逻辑主语是the opening ceremony，且和逻辑主语是被动关系，再加上prepare动作明显发生在谓语之前，所以用现在分词完成时的被动形式作状语。句意：通过长时间精心的准备，这个开业典礼取得了巨大的成功。故选D。