It’sbesttostayindoors,
- 习题库
- 关注:2.62W次
问题详情:
It’s best to stay indoors , ________when PM2.5 has reached dangerous levels.
A. exactly B. possibly C. generally D. especially
【回答】
D
知识点:副词
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/k1g6wk.html