阿摩線上測驗
14. In the face of energy crisis, scientists worldwide are now exploring _______ energy to replace fossil fuels.
(A)alleviating
(B)alternative
(C)allergic
(D)altitudinal
答案：登入後查看
統計： A(21), B(598), C(50), D(28), E(0) #537105
統計： A(21), B(598), C(50), D(28), E(0) #537105
