Complete each of the following sentence with a (compound) word derived from the one(s) given in bracket.
If we act fast, we can once and for all prevent wild animals from suffering terrible （ ）. (cruel)
【正确答案】：CRUELTY
【题目解析】：
本题考查的是常见形容词的名词。
由from和terrible可知，空白处应填名词，cruel的名词是cruelty 残忍，另外once and for all表示一劳永逸地；彻底地。
句意：如果我们行动迅速，我们就可以一劳永逸地防止野生动物遭受可怕的虐待。