Of course, ________ access to up-to-date irformation is ________ for anyone who is doing research. --优优班--学霸训练营

Of course, ________ access to up-to-date irformation is ________ for anyone who is doing research.

A．the ; very important

B．/;of a great importance

C．/, of great importance

D．an ; great important

【考点】介词（短语）辨析,零冠词

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难度：中等

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