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问题: Most of these tools have been speciall ------

Most of these tools have been speciall ------for use by disabled people。
A adopted B adapted
适应 C adapting Dadopting

解答:

应该选B吧.
首先,中文意思是:残疾人已经适应很多的工具.
ADOPT是喂养的意思,舍去
这里的have been后面有两种
一个是DONE.一个是DOING.
done表被动,doing表延续性动作.
工具和USE这个动词是被动关系,所以用DONE.
所以选B