Помогите нужно написать в правильной форме .I just cannot/mustn't) find the time to (make/do) the accounts.I'm way behind with (my/mine)work.I (hasn't got / haven't got) any (foods/food) at the moment.I (don't/doesn't) understa...

Помогите нужно написать в правильной форме . I just cannot/mustn't) find the time to (make/do) the accounts.I'm way behind with (my/mine)work. I (hasn't got / haven't got) any (foods/food) at the moment. I (don't/doesn't) understand this point of grammar.I wish I (to understand) it (gooder/better). Linda said:'I am going to have a nap this afternoon."                  If I study,I (to pass) the exams.