35б!!!!!
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.

1) finished

2) had returned

3) entered, had already opened

4) saw, hadn't washed

5) understood, hadn't done