大学MOOC 《综合英语》1(中国矿业大学)1463763162 最新慕课完整章节测试答案
OneTheNatureofLanguage
vocabularyandgrammar
1、单选题:
Nowhere in nature is aluminum found free, owing to its always___a_with other elements, most commonly with oxygen.
选项:
A: A. being combined
B: B. having combined
C: C. to combine
D: D. combined
答案: 【 A. being combined 】点我阅读全文
