My English -Chinese dictionary has disappeared.Who __have ta

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My English -Chinese dictionary has disappeared.Who __have taken it?A should B must C could D would
哪位老师可以告诉一下为什么选could 而不能选would

首先是语法的问题：
那个问句用了过去【虚拟】时态,只能用【could/should】+ have done
其次是语义的问题：
在虚拟时态当中,should表【应该】的意思,而could在一般句中表【能够】,在疑问句中表【可能】的意思

My English -Chinese dictionary has disappeared.Who __have ta _____of us has an English -Chinese dictionary . My dictionary has disappeared.who_have taken it?A.should B m ____ of us has an English-Chinese dictionary. ___ of us has an English-Chinese dictionary. __an English -chinese dictionary. English -Chinese dictionary ________an english-chinese dictionary. 12.He took my English-Chinese dictionary _____ mistake. he has an English dictionary.（用a Chinese dictionary改为选择疑问句） She has an English dictionary and a Chinese dictionary.改为否定句 my book has disappeared.who______have taken it?