15. The reviewers’ challenges need to be embraced because it is indeed imperative to base learning
theories _____ empirical evidence.
(A) off
(B) to
(C) on
(D) at
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統計: A(5), B(20), C(302), D(10), E(0) #2746596
統計: A(5), B(20), C(302), D(10), E(0) #2746596