Thank you for sharing this worksheet. I would like to point out two things that made my students give a "wrong" answer, in case you can spare the time to change that:
In number 7 there is no clue in the context to show that they have to use "the students" in the answer. You could replace the original sentence with
"Please, put the books away when the lesson finishes", the teacher said to the students. (Maybe it would be a good idea to admit "told" as well as "asked", even if it is not in the list of verbs they have to use).
In number 8 there is no clue in the context to show
that they have to use "to us" in the answer. You could admit as correct also "explained that", or add to the previous sentence "... the technician told us".