◎ 题干
—Is that Jack speaking?  
—Sorry, he _______ in. He _______ back in half an hour.      
[     ]
A. isn't; will be      
B. wasn't; will      
C. isn't; is    
D. wasn't; was
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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 that Jack speaking? —Sorry, he _______ in. He _______ back in half an hour. [ ]A. isn't; will beB. wasn't; will C. isn't; is D. wasn't; was…”主要考查了你对  【一般现在时】【一般将来时】  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。