10. Allergic ________usually happen quickly within a few minutes of exposure to an allergen.
(A) representations
(B) recreations
(C) relatives
(D) reactions
(E) reinforcements
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統計: A(1), B(0), C(0), D(36), E(0) #3081430
統計: A(1), B(0), C(0), D(36), E(0) #3081430