中国大学MOOC: There are _____ parts in an invitation letter.
举一反三
- 中国大学MOOC: There are ______ principle parts in a business letter.
- Translate parts of the following invitation letter into English.
- 中国大学MOOC: A letter of invitation can be classified into formal invitation and informal invitation.
- There are _____ parts in an invitation letter. A: 4 B: 5 C: 6 D: 7
- 中国大学MOOC: The invitation letter shown here can also be called as a letter of _________.【图片】