18. _____ studies show that some forms of alternative medicine are extremely effective.
(A) Experienced
(B) Engaged
(C) Eligible
(D) Empirical
(E) Elevated
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統計: A(10), B(3), C(7), D(26), E(0) #1021239
統計: A(10), B(3), C(7), D(26), E(0) #1021239