問題詳情
20.With ponds, lakes, and rivers scattered throughout Taiwan, farmers have long made raising ducks and geese an important sideline business, and the production of feathers and down ______ relatively stable over the years.
(A) became
(B) was remaining
(C) has remained
(D) is
參考答案
答案：C
難度：簡單0.708333
統計：A(4),B(1),C(17),D(1),E(0)
用户評論
【用戶】今年必上
【年級】高二下
【評論內容】down