28. The words "Ammi visnaga" in this passage are most likely a name of _
(A) an allergen
(B) an online pharmacy
(C) a plant
(D) a chemical
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統計: A(6), B(4), C(43), D(16), E(0) #3056753
統計: A(6), B(4), C(43), D(16), E(0) #3056753