What function does meta-discourse serve in composing an essay?
A.To guide the reader through the text.
B.To mark the structure of a discourse.
C.To engage the reader.
D.All of the above.
正确答案：All of the above.
What function does meta-discourse serve in composing an essay?
A.To guide the reader through the text.
B.To mark the structure of a discourse.
C.To engage the reader.
D.All of the above.
正确答案：All of the above.