39. Mobile phone usage is universal in high schools and some
unhappy principals are moved to install metal detectors.
(A)usage
(B) universal
(C)unhappy
(D)moved
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統計: A(13), B(16), C(28), D(68), E(0) #1596569
統計: A(13), B(16), C(28), D(68), E(0) #1596569