I don't know why they always argue with each other and can't

I don't know why you can put up with his words?I don't know But they don't a____ with each other don;t know each other very well. They don't ___ ___ each other. ohhh.. my chat filters you..( i don`t know why... and i can` we don't have to know each other,I don't want to. They couldn't agree with each other We even don't know each other和We don't even know each other — Don't argue with I don't know why always like this!Don't do like that! I don't know,And no WHY!什么意思? I don't know how they deal with the problem=I don't know （ ）