这双鞋的价格是50美元。

The ___cost of these shoes is $50.

这次胜利是以许多士兵的生命为代价换来的。

The victory came at the ___cost of many soldiers' lives.

那次事故让他失去了一条腿。

The accident ___cost him a leg.

设计师会估算装修这套公寓的费用。

The designer will ___estimate the renovation of this apartment.