阿摩線上測驗
16. Renewable energy sources, such as solar and wind power, __________ as sustainable alternatives to fossil
fuels.
(A) have been promoted
(B) has been promoted
(C) being promoted
(D) promoted
答案：登入後查看
統計： A(202), B(12), C(12), D(18), E(0) #3223536
統計： A(202), B(12), C(12), D(18), E(0) #3223536
