他突然意识到自己忘了关煤气。

A sudden ___realization hit him that he had forgotten to turn off the gas.

出版这本书实现了他多年来的努力。

Publishing this book was the ___realization of his years of hard work.

由于急需资金，他们决定将股票变现。

They decided on the ___sale of their stocks due to urgent need for cash.