My Enlish-Chinese dictionary has disappeared,who ---have taken it_英语解答

My Enlish-Chinese dictionary has disappeared,who ---have taken it?
我觉得应该填can或could
疑问句中表推测吧

人气：370 ℃　时间：2019-10-19 16:21:22

解答

因为已经不见了
所以是对过去的推测
must have done是对过去的猜测
而could have done 就是说“本能够做到什么”（隐含当时没能达到这个能力）