◎ 题干
All the students were sweeping the floor __________ they heard a man __________.
                                                                                                                                                         [    ]
A. when;shouting
B. while;to shout
C. when;to shout
D. while;shouting
◎ 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“All the students were sweeping the floor __________ they heard a man __________. [ ]A. when;shouting B. while;to shoutC. when;to shout D. while;shouting…”主要考查了你对  【分词】【并列连词】  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。