◎ 题干
A driver should _____ the road when _____.
[     ]
A. concentrate on; drive
B. concentrate in; driving
C. concentrate to; drove
D. concentrate on; driving
◎ 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“A driver should _____ the road when _____.[ ]A. concentrate on; drive B. concentrate in; drivingC. concentrate to; droveD. concentrate on; driving …”主要考查了你对  【动词短语】【现在分词】  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。