阿摩線上測驗
33. Scientists have successfully developed a ______ for the infectious disease, so few children
are suffering from it now.
(A)vaccine
(B)portfolio
(C)cushion
(D)momentum
答案：登入後查看
統計： A(187), B(10), C(12), D(7), E(0) #2928736
統計： A(187), B(10), C(12), D(7), E(0) #2928736
