阿摩線上測驗
30 All fire control machines and tools have to be _____ by a government official on a regular basis.
(A) inspected
(B) confirmed
(C) checkmated
(D) investigated
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統計： A(137), B(84), C(62), D(31), E(0) #3118508
統計： A(137), B(84), C(62), D(31), E(0) #3118508
