physics paper

here's my situation I haven't solved any past papers except literally 2 and I CAN'T solve any electricity questions like I just can't there's no way nuh uh nope nay not at all let alone that I make mistakes in the other units obviously but not as bad as electricity. I don't know what to do and I've ict a day before it and I need to restudy the theory so I've no idea what to do.... I've bio on may 6 as well.. I really need to get that a star please any help