阿摩線上測驗
31 No one is fully _____ from the disease until more effective vaccines are invented.
(A) durable
(B) immune
(C) hospitable
(D) accessible
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統計： A(45), B(365), C(69), D(50), E(0) #2939193
統計： A(45), B(365), C(69), D(50), E(0) #2939193
