阿摩線上測驗
77 According to the passage, what does a mystery shopper do?
(A) Observe how customers behave.
(B) Gather specific information about services.
(C) Visit some stores and talk with managers.
(D) Exchange information in a mysterious way.
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統計： A(2), B(28), C(13), D(2), E(0) #743008
統計： A(2), B(28), C(13), D(2), E(0) #743008