33. According to the passage, which of the following is the least commonly used animal in healing people?
(A) horses
(B) llamas
(C) birds
(D) deer
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統計: A(92), B(1062), C(406), D(81), E(0) #3345185
統計: A(92), B(1062), C(406), D(81), E(0) #3345185