My wallet is nowhere to be found.I_____it when I was on the bus.-查字典考试网

My wallet is nowhere to be found.I_____it when I was on the bus.

MIP.watch('count', function (newVal, oldVal) { fetch('http://www.chazidian.com/kaoshi/ajaxapi/?action=guanzhu&id=69455&type=2') .then(function (res) { var follows2 = MIP.getData('follows') if(follows2==1){ MIP.setData({ follows:2, title:'收藏' }) } if(follows2==2){ console.log(2) MIP.setData({ follows:1, title:'已收藏' }) } }) .catch(function (err) { console.log('数据请求失败！') }) })

My wallet is nowhere to be found.I_____it when I was on the bus.

A、mustdrop
B、shouldhavedropped
C、haddropped
D、musthavedropped

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正确答案：

答案解析：

musthave+done用于推断过去某个时间肯定发生了的事情。

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My wallet is nowhere to be found.I_____it when I was on the bus.

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