音乐会在烟花表演中结束。

The concert ___concluded with a firework display.

我想以感谢大家的出席来结束。

I would like to ___conclude by thanking you all for attending.

总结一下，我想再次强调为我们学院设立图书馆是多么重要。

To ___conclude, I would like to underline one more time how crucial the setting up of a library would be for our college.