So the dialogue will help the students to use English directly without their mother tongu

问题补充：

So the dialogue will help the students to use English directly without their mother tongue.

A. referring to

B. adding to

C. pointing to

D. sticking to

答案：

(答案→)A. referring to

B. adding to

C. pointing to

D. sticking to

解析：这里用referr to表示：向…求助。