問題詳情
Since the 1930s, hundreds of stone balls have been found in Costa Rica. It’s believed that they ______ by the ancestors of native peoples who lived there at the time of the Spanish conquest.
(A)could have been made
(B)have been making
(C)could make
(D)being made
參考答案
答案：A
難度：適中0.592335
統計：A(170),B(47),C(27),D(15),E(0) #
個人：尚未作答書單：make up one's mind 下決心、文法、拔出
用户評論
【Chun Jen Wan】評論
20世紀30年代以來，已發現數百個石球在哥斯達黎加。它認為，它們可能是由原住民的祖先在西班牙征服的時候，誰住在這裡。