In the experiment we kept a watchful eye______the developments and recorded every detail.

admin2021-08-03  28

问题 In the experiment we kept a watchful eye______the developments and recorded every detail.

选项 A、in
B、at
C、for
D、on

答案D

解析
转载请注明原文地址:https://kaotiyun.com/show/RIRC777K
本试题收录于: 英语题库普高专升本分类
0

随机试题
最新回复(0)