想必现在有很多小伙伴对于-How did Tom hurt his leg yesterday -He was walking home ________ a bike hit him．（　　）A.whileB. whenC. beforeD. during","title_text":"-How did Tom hurt his leg yesterday -He was walking home ________ a bike hit him．（　　）A.whileB. whenC. beforeD. during方面的知识都比较想要了解，那么今天小好小编就为大家收集了一些关于-How did Tom hurt his leg yesterday -He was walking home ________ a bike hit him．（　　）A.whileB. whenC. beforeD. during","title_text":"-How did Tom hurt his leg yesterday -He was walking home ________ a bike hit him．（　　）A.whileB. whenC. beforeD. during方面的知识分享给大家，希望大家会喜欢哦。

AB表示当……时候，都可引导时间状语，其区别在于while其谓语动词通常是持续性动词。

when即可是持续性动词也可是短暂性动词．C表示在……之前．D表示在……期间．根据题干可知当汤姆正在回家的时候，一辆自行车撞了他，又因从句中hit是短暂性动词。

则应用连词when．故选：B．。

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