阿摩線上測驗
27.The Department of Health urged the public to receive H1N1 flu shot as a __________ against potential outbreaks.
(A) prohibition
(B) preparation
(C) presumption
(D) precaution
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統計： A(8), B(11), C(0), D(21), E(0) #667022
統計： A(8), B(11), C(0), D(21), E(0) #667022
