When you finish the Letter writing exercise, go on to the language exercises that follow.

当你完成“书信写作”后，就可以开始紧随其后的语言练习。

youdao

When you finish the Letter writing exercise, go on to the language exercises that follow.

当你完成“书信写作”后，就可以开始紧随其后的语言练习。

youdao