12. Smartphone_is everywhere. Take a glance at your day-to-day life and you'l[ notice your friends are a bit too preoccupied with their iOS or Android devices. Some even claim they can't live without their cell phones.
(A) connection
(B) dependency
(C) delinquency
(D) wave

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統計： A(5), B(12), C(2), D(44), E(0) #1884220