◎ 题干
-Is James at home?
-No, he __________ Ya'an to be a volunteer.
A. has gone to    
B. has been to        
C. is going to
D  has to 
◎ 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“ -Is James at home?-No, he __________ Ya'an to be a volunteer.A. has gone toB. has been toC. is going toD has to…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  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。