◎ 题干
He must be helping the old man to water the flowers, _____?
[     ]
A. is he
B. isn't he
C. must he
D. mustn't he
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“He must be helping the old man to water the flowers, _____?[ ]A. is he B. isn't he C. must he D. mustn't he …”主要考查了你对  【反意疑问句】  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。