Раскройте скобки, поставив глаголы в past simple или past perfect. i (to finish) my homework at 7 p.m. tina (to return) from the cinema by 9 p.m. when the teacher (to enter) the classroom, the students already (to open) their notebooks. mother (to see) that her son (not to wash) his hands. the teacher (to understand) that helen (not to do) her homework. i (to know) that my friend (not to come) yet. when i (to wake up) yesterday, father already (to go) to work. tom (to think) that his father (not to come) home yet. mary (to tell) us that she (to cook) a good dinner. yesterday i (to find) the book which i (to lose) in summer.

I  finishуed my homework at 7 p.m.
Tina had returned from the cinema by 9 p.m.
When the teacher entered the classroom, the students had already opened their notebooks.
Mother saw that her son had not washed his hands.
The teacher understood that Helen had not done her homework.
I knew that my friend had not come yet.
When I woke up yesterday, father had already gone to work.
Tom thought that his father had not come home yet.
Mary told us that she had cooked a good dinner.
Yesterday I found the book which I lost/had lost in summer.