Theypreparedman-maderubberasa(n)
- 习题库
- 关注:2.1W次
问题详情:
They prepared man-made rubber as a(n)_________ for the natural rubber that they could no longer obtain.
A. preference B. assistant C. substitute D. exchange
【回答】
C
知识点:名词
题型:选择题
- 文章版权属于文章作者所有,转载请注明 https://zhongwengu.com/exercises/elk872.html