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It hasn't been proved that sleepwalkers (can't/to wake) safely.

не увидела конкретных условий, поэтому

It hasn't been proved that sleepwalkers can't wake safely.

! i study at school number(номер школы). in the classroom(какой класс). my favorite subject is english language . i want to know english because i want to talk fluently in english. yet.

                                          перевод  

! я учусь в школе номер. в классе. мой любимый предмет язык . я хочу знать потому что хочу свободно разговаривать на языке. пока.

the positive character/hero

the positive character (hero) is always good, because he's always a positive role model for young children. especially in russian literature, the positive character (hero) always sets the examples for reader's behavior. the good always wins over bad (evil).