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　　>>>拓展阅读：手把手教你六步搞定雅思阅读长难句分析

　　● 题目：

　　A popular explanation of play has been that it helps juveniles develop the skills they will need to hunt. (test2 passage 3)

　　● 分析：

　　本句的主句为“A popular explanation of play has been that…”;“that it helps juveniles develop the skills they will need to hunt”为that引导的表语从句，作has been的表语;“they will need to hunt”为定语从句，关系词在定语从句中作宾语，被省略。