--YesterdayMarybroketwoglasseswhenshewaswashingthem.--I'mnotsure.Ho

发布时间：2020-08-04 20:40:26

--Yesterday Mary broke two glasses when she was washing them.--I'm not sure. How ________ she be so careless?A.mayB.shouldC.couldD.must

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C解析I'm not sure. 提示不太相信上面的话，用How could...? 表示“……怎么可能呢?”
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