It’sbesttostayindoors,
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
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