寻找适合你的 英语 教师…
Vocabulary based on this video: https://www.youtube.com/watch?v=5EsICTVo2dM&ab_channel=TED-Ed
测试题目 1 共 9 项
What does 'mainstay' mean?
A temporary or unimportant part of something.
A thing that is the most important or fundamental part of something.