---DidyouhearthatBen______hisleg?---Yes．How______?A.hadbroken;didithapp

发布时间：2020-08-06 20:52:12

---Did you hear that Ben ______ his leg?---Yes．How ______?A.had broken; did it happenB.had broken; has it happenedC.broke; has it happenedD.has broken; did it happen

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A解析从did…可知后面的动作早于过去，应该选择过去完成时态；答语问过去是“怎么发生的？”，故选择A项。
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