I find -----English is very difficult for me .A spoken B spe

从语法上讲AB都可以,
因为find （that ） speaking/spoken English is very difficult for me
这是一个宾语从句,需要填主语.A,B都有名词的功能,spoken English是名词,speaking English 是现在分词短语.
从语感上讲,B更好些,因为整个句子主语是I,所以主动语态比被动语态更合适些.