( )Documentaries play in important role in ____the public.A educatingB educateC education D educational

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( )Documentaries play in important role in ____the public.A educatingB educateC education D educational

( )Documentaries play in important role in ____the public.A educatingB educateC education D educational
( )Documentaries play in important role in ____the public.
A educating
B educate
C education
D educational

( )Documentaries play in important role in ____the public.A educatingB educateC education D educational
A

D C
第一个是形容词，第二个是名词。

A 介词in后 接动名词

a

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