◎ 题干
While _______ across the street, you should be careful.
[     ]
A. walk
B. walking
C. being walked
D. walked
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“While _______ across the street, you should be careful.[ ]A. walk B. walking C. being walked D. walked …”主要考查了你对  【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。