– Mary was crying sadly. -- Oh, she ________ the bad news that her mother was badly injured in..
–Marywascryingsadly.--Oh,she________thebadnewsthathermotherwasbadlyinjuredintheaccide...
– Mary was crying sadly. -- Oh, she ________ the bad news that her mother was badly injured in the accident. A．must know B．might have known C．must have known D．should have known
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| C |
| 考查虚拟语气.句意:玛丽哭得很伤心._哦,她一定是知道了她的母亲在车祸中严重受伤的坏消息了. “must+have+done”表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。结合语境可知选C. |
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