【I had walked as long as for four and my leg be】

问题补充：

I had walked as long as for four and my leg began to

答案：

injure比hurt正式,hurt多指伤痛,而injure则指损害健康,成就,容貌等,强调功能的损失,尤其可指身体某个部位的的伤害.

所以这道题用injure比较合适.

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