Do you have any difficulties_____out the problem?填working 还是to work?why?
问题描述：
Do you have any difficulties_____out the problem?填working 还是to work?why?
答
in working.......
答
to work
答
working
答
have difficulty to do sth
have difficulty in doing sth
答
working
have problem/difficulty 后面接动词ing形式
I don't have any difficulty understanding you.