【题目】The government has announced to rescue the cultural heritage at any cost.
The government has announced to rescue the cultural heritage the cost.

【答案】regardless of
【解析】句意：政府已经宣布要不惜一切代价挽救文化遗产。at any cost“无论如何；不惜任何代价”，等于at all most；regardless of“不顾，不管”的意思。故填regardless of。