Англ.яз4
Употребите предложения the Past Perfect Tense.
Model
1)They Finished their experiment (by last Friday)
2)She typed the letter (by the time we returned)
3)He looked through the document (By 5 o`clock)
4)He had supper at 8 o`clock (by that time)
По дате
По рейтингу
They had finished their experiment by last Friday
By the time we returned she had typed the letter
He had looked through the document by 5 o`clock.
He had eaten his supper by 8 o`clock