中国大学MOOC: For a formal information, we usually write invitation letters.
举一反三
- 中国大学MOOC:"Invitation letters are usually sent by _________ to scholars and experts in the field and other prospective participants. ";
- 中国大学MOOC: Why do we write an invitation letter?_
- 中国大学MOOC: To write an invitation card, we need figure out what an invitation card should _____________
- Generally speaking, letters can be classified into formal letters and informal letters based on the formality of letters.
- 中国大学MOOC: A letter of invitation can be classified into formal invitation and informal invitation.