I have some problem ____ it out.A.working B.to work

No problem.when i have some free I have a store throat =I have some problem with my throat “ problem ”写错了，应为“ problems” i have no problem! i often have some problem making complete sentences中problem若是可数名词为什么在这句中没加s I have some problems/difficulty/trouble to work out the problem.(改错） I have some problem ____ it out.A.working B.to work ok i have some problem with shanghai .can you help me with that I have some problem (finish) my homeworkfinish 应该用什么形式 Have some problem 后面的problem加不加s I must have a problem I have some problem _working out the prblem用介词 to,at,in,on填空,应选啥急 Can I have some May I have some I have some milk___bread__breakfast can I have some I have some friends.have 我的问题是：I have no problem I have a mental problem.什么意思?