◎ 题干
He's             a new bike for three weeks.
[     ]
A. buy
B. buying
C. had
D. bought
◎ 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“He's a new bike for three weeks. [ ]A. buy B. buying C. had D. bought …”主要考查了你对  【实义动词的过去分词】【现在完成时】  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。