2. 职称英语
  3. At first, little______that we were sitting on top of a fundamental discovery in

At first, little______that we were sitting on top of a fundamental discovery in

游客2023-11-20  33
问题 At first, little______that we were sitting on top of a fundamental discovery in AIDS research.
选项 A、we knew
B、we did know
C、did we know
D、do we know
答案 C
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/3203918.html
相关试题推荐
随机试题
最新回复(0)