From his________voice on the phone I know what his son did____him；in other words,his son is____
问题描述：
From his________voice on the phone I know what his son did____him；in other words,his son is____
用disappointing; disappoint; disappointed; disappointment填空,麻烦您注明一下为何这么填,我记得~ed是说人怎样,~ing通常是说物,这个句子中我晕了,麻烦您回答了,听明白后我追加分数奖励,谢谢您~
答
1 disappointed adj. 感到失望的（声音听起来让人知道他感到失望）
2 disappoint vt.使人失望
3 disappointingadj. 令人失望的声音表现出