We may learn English well by it.A. speaking spokenB. spoken speakingC. spoken spokenD

问题补充：

We may learn English well by it.

A. speaking, spoken

B. spoken, speaking

C. spoken, spoken

D. speaking, speaking

答案：

A. speaking, spoken

(答案→)B. spoken, speaking

C. spoken, spoken

D. speaking, speaking

解析：说英语口语用spoken English, by是介词,所以后接动名词speaking