What are the functions of signal words？

A.To aid predicting what is coming next in the reading material.

B.To identify the pattern the author is using to get the points across.

C.To mark relations between sentence parts， between sentences， or even between paragraphs.

D.To get the main idea of a passage.

正確答案：To aid predicting what is coming next in the reading material.To identify the pattern the author is using to get the points across.To mark relations between sentence parts， between sentences， or even between paragraphs.