問題詳情
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
參考答案
答案：A
統計：A:54,B:1,C:3,D:7,E:0
難度：非常簡單
用户評論
【uu(已上榜)】評論
Renewable energy sources(主詞是複數), such as solar and wind power, __________(缺動詞) as sustainable alternatives to fossil fuels.