Ms.

Ms. Johnson will be your project supervisor during the summer internship.

(Chinese) 约翰逊女士将在暑期实习期间担任您的项目主管。

If you are unsure of a woman's marital status, it is best to address her as Ms.

(Chinese) 如果你不确定一位女性的婚姻状况，最好称呼她为“女士”。