9. Smartphones have become _____ in modern society, seen in the hands of nearly everyone.
(A) tertiary
(B) ubiquitous
(C) meticulous
(D) tenuous
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統計: A(1), B(172), C(11), D(7), E(0) #3425854
統計: A(1), B(172), C(11), D(7), E(0) #3425854