摘要： So popular that the young generation are dying for one. A. has iPhone 4 become B. iPhone 4 has become C. had iPhone 4 become D. iPhone 4 had become
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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
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B. iPhone 4 had become
C. has iPhone 4 become
D. had iPhone 4 become