很多家长都会有这样的疑问：如果孩子真的去美国上学，或者进国际学校，每天到底会说些什么英语？其实和课本里的句子很不一样。

To whom it may concern 敬启者 Episode 191022 / 22 Oct 2019 Learn a useful English phrase to use at the beginning of a formal email, when you do not know the name of the person or persons you need to ...