◎ 题干
-Why do you look sad?    
-There are so many problems _______    
[     ]
A. remained to be settled                      
B. remained setting    
C. remaining to settle                          
D. remaining to be settled
◎ 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“-Why do you look sad?-There are so many problems _______[ ]A. remained to be settled B. remained settingC. remaining to settleD. remaining to be settled…”主要考查了你对  【现在分词的被动式】  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。