A-A+ The new music was built out of materials alrea 2022-08-06 10:43:00 问答库 阅读 178 次 问题详情 The new music was built out of materials already in______. (exist)：blues，rock"n"roll，folk music. 参考答案 正确答案：existence[解析] in existence存在的，现存的，现有的。
