1. Many businesses believe that “the _____ is always right,” so they try to provide the best possible service.
(A) boss
(B) doctor
(C) customer
(D) teacher
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統計: A(0), B(1), C(9), D(0), E(0) #4036305
統計: A(0), B(1), C(9), D(0), E(0) #4036305