阿摩線上測驗
13 Social media has become a powerful tool ______ marketers.
(A) for
(B) of
(C) with
(D) to
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統計： A(158), B(26), C(9), D(71), E(0) #3744887
統計： A(158), B(26), C(9), D(71), E(0) #3744887
