◎ 题干
-I haven't been to the Great Wall.    
-If you have an opportunity ________ there, you must take it.    
[     ]

A. to go
B. to going
C. going
D. go

◎ 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“-I haven't been to the Great Wall.-If you have an opportunity ________ there, you must take it. [ ]A. to go B. to going C. going D. go…”主要考查了你对  【不定式】  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。