由于成本降低，公司的利润大幅增加。

The company's profits increased ___greatly due to cost reductions.

近年来，岛上的鸟类数量大大增加了。

The number of birds on the island has ___greatly increased in recent years.

她的钢琴演奏水平有了很大提高。

Her piano playing has ___greatly improved.