Definition: not later than; at/on or before Level: A2
请你在周五之前提交作业。
Please submit your homework ___by Friday.
我需要在今天下班前拿到报告。
I need the report ___by the end of the day.
我们应该在8点前到达看电影。
We should arrive ___by 8 o'clock for the movie.
