✅ 同义词
🗣️ 情景例句
Good. Thank you. I'll be right down.
好，谢谢你。我马上下来。
While you were writing letters,I was reading a book.
当你正在写信时，我正在读一本书。
In this shop you can buy school things.
你可以在这个商店里买到学习用品。