阿摩線上測驗
103. All employees are required to review the safety guidelines________before operating the heavy machinery.
(A) thorough
(B) thoroughness
(C) thoroughly
(D) throughout
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統計： A(64), B(30), C(452), D(51), E(0) #3782035
統計： A(64), B(30), C(452), D(51), E(0) #3782035
