Good morning,I am Portuguese but I teach English in a state school.
I really liked your worksheet and that´s why I asked my 12-year-old students (7th grade -level 3 of English) to try to do your it.
However I realised that when we do whatever your answers are (and I´ve tried doing it several time and in different ways), your score is always 3 out of 10. So, if possible I would like to know why this happens because as a teacher I would like to explain my students what the problem might be. I don´t want them to be disappointed.