Open the brackets and put the verbs into past simple or past perfect. 1) i (to finish) my homework at 7 p.m. 2) tina (to return) from the cinema by 9 p.m. 3) when the teacher (to enter) the classroom, the students already (to open) their notebooks. 4) mother (to see) that her son (not to wash) his hands. 5) the teacher (to understand) that helen (not to do) her homework.