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The system of Braille is really _____________ to the blind.

A. of great useful B. great useful C. great use D. of great use

 

D

【解析】

試題分析:句意:盲人系統(tǒng)對盲人真的是有用的。這里使用be of+抽象名詞=形容詞,great是形容詞修飾名詞use,of great use=very useful,所以選D。

考點:考查介詞短語

 

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