He is really lucky to have succeeded___others failed.横线是填 when还是as,写出原因,它们都有当.时候的意思,它是单项选择 A when B as C where D in which 选答案请写上原因。谢谢

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He is really lucky to have succeeded___others failed.横线是填 when还是as,写出原因,
它们都有当.时候的意思,
它是单项选择 A when B as C where D in which 选答案请写上原因。谢谢

as