◎ 题干
Not all insects are pests; in fact, a great many of them are ____ to man.
[     ]
A. benefit        
B.beneficent
C. beneficial      
D.beneficially
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Not all insects are pests; in fact, a great many of them are ____ to man.[ ]A. benefit B.beneficent C. beneficialD.beneficially…”主要考查了你对  【形容词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。