"Nation” as a free root can function alone in a sentence while "diet" is a ______, which can not function alone grammatically an

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问题 "Nation” as a free root can function alone in a sentence while "diet" is a ______, which can not function alone grammatically and has to combine with other morphemes to create new words.

选项 A、active root
B、fixed root
C、non-free root
D、bound root

答案D

解析 dict属于bound root,必须和别的词素结合构成新词。
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