阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
(2015·沈阳市郊联体二模)
One day a farmer's donkey fell down into a well. The animal cried piteously __1__ hours as the farmer tried to figure out what to do. Finally, he decided the animal was old, and the well needed __2__(cover) up anyway; it just wasn't worth __3__ to save the donkey.
