阿摩線上測驗
4.The scientists carried out a(n) _____ on the monkey to test the new drug.
(A) appointment
(B) situation
(C) experiment
(D) expense
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統計： A(11), B(21), C(47), D(3), E(0) #2261996
統計： A(11), B(21), C(47), D(3), E(0) #2261996
