I don't have any____in learning English grammar.but I often make speling mistakes difficulty troubles difficulties problems

I don't have any____in learning English grammar.but I often make speling mistakes difficulty troubles difficulties problems
I don't have any____in learning English grammar.but I often make speling mistakes
difficulty
troubles
difficulties
problems

I don't have any____in learning English grammar.but I often make speling mistakes difficulty troubles difficulties problems
difficulty / trouble （单数）

difficulties

difficulties
保证没错