◎ 题干
Some people are good at _____ voices on the phone while others ______.   
 [     ]
A. knowing; aren't  
B. recognizing; don't  
C. knowing; don't
D. recognizing; aren't
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Some people are good at _____ voices on the phone while others ______.[ ]A. knowing; aren'tB. recognizing; don't C. knowing; don't D. recognizing; ar…”主要考查了你对  【系动词】【动词】  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。