She said that the doctor must have got stuck in a traffic jam, otherwise he______by then.

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问题 She said that the doctor must have got stuck in a traffic jam, otherwise he______by then.

选项 A、would arrive
B、would have arrived
C、should arrive
D、must have arrived

答案B

解析 根据句意可知,本句为otherwise引导的含蓄条件句。题干前半句中使用了“must have done”结构,表示对过去情况的肯定推测,otherwise之后的分句表达的是对过去情况的虚拟,谓语动词要使用“would have done”结构。故选B。
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