8. If my granny not / can remember the password, she always write it on a piece of paper. I keep saying to her that it's very unsafe.

В данном предложении необходимо выбрать правильную форму глагола: can или not. По смыслу предложения подходит отрицательная форма, так как речь идет о том, что бабушка не может запомнить пароль.

Правильный вариант: If my granny cannot remember the password, she always write it on a piece of paper. I keep saying to her that it's very unsafe.

Ответ: If my granny cannot remember the password, she always write it on a piece of paper. I keep saying to her that it's very unsafe.