I'm surprised at the ____ (close) of the factory.

问题描述:

I'm surprised at the ____ (close) of the factory.

I'm surprised at the __closing__ (close) of the factory.
应该使用closing,我刚跟我的加拿大朋友确认了下,确实应该使用closing.
句子的意思是:我对工厂的关门很是吃惊.