◎ 题干
—When ______ this activity________ every year?
—It is held in spring every year.  
[     ]
A. is; happened    
B. does; take place  
C. is; happening    
D. is ; taken place
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—When ______ this activity________ every year?—It is held in spring every year.[ ]A. is; happenedB. does; take placeC. is; happeningD. is ; taken place…”主要考查了你对  【助动词】【动词短语】  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。