单项选择题

Read the following excerpts from different genres and  determine the genres according to the language features.
Some verbs are used transitively and intransitively with different kinds of subject; the intransitive use has a meaning rather like a passive or reflexive verb and these verbs have commonly become known as ergative verbs.

A.post card
B.workplace email
C.grammar textbook
D.administrative document
微信扫码免费搜题