◎ 题干
Having a trip is certainly good for us, but it remains____ whether you will enjoy it.    
[     ]
A. to see    
B. to be seen    
C. seeing  
D. seen
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Having a trip is certainly good for us, but it remains____ whether you willenjoy it. [ ]A. to see B. to be seenC. seeing D. seen…”主要考查了你对  【不定式的被动式】  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。