◎ 题干
Half of the class ________ done most of the work. The left ________ rather hard.
[     ]
A. have ; is
B. has; is        
C. have ; are
D. has ; are
◎ 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“Half of the class ________ done most of the work. The left ________ rather hard.[ ]A. have ; is B. has; isC. have ; are D. has ; are…”主要考查了你对  【系动词】【助动词】  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。