◎ 题干
So popular ________ that the young generation are dying for one.

[     ]

A. iPhone 4 has become
B. iPhone 4 had become
C. has iPhone 4 become
D. had iPhone 4 become
◎ 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“So popular ________ that the young generation are dying for one. [ ]A. iPhone 4 has become B. iPhone 4 had become C. has iPhone 4 become D. had iPhone 4 bec…”主要考查了你对  【现在完成时】【部分倒装】  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。