问题描述：
名词性从句的引导词what只能做从句的宾语吗
比如what he needs is so study hard.还有些that who which whom when的,都只能做从句宾语吗
比如what he needs is so study hard.还有些that who which whom when的,都只能做从句宾语吗
问题解答：
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