15. The police have to work _____ to protect the citizens’ safety and properties.
(A) around the clock
(B) in the extreme
(C) on the house
(D) in the majority

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統計： A(123), B(19), C(3), D(38), E(0) #2546410

詳解 (共 1 筆)

#4675079
(A)全天的，全天候的；不分晝夜的(B)...
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