these alone took sixteenth months to build 是什么样的结构呢?

分类: 作业答案 • 2022-01-13 18:14:21

问题描述：

答

(these),alone took sixteenth months to build 句型 it takes(took) sb.sometime to do something “花费.时间,做.” 这些只用了16个月建设成了.