中文谷carefullyifanychangeoccurswhendoingexperimentsint...
- 习题库
- 关注：2.21W次
问题详情：
carefully if any change occurs when doing experiments in the lab.
A. Observe B. To observe C. Observed D. Observing
【回答】
A
知识点：祈使句 感叹句
题型：选择题
标签：
- 文章版权属于文章作者所有，转载请注明 https://zhongwengu.com/exercises/d853j2.html
