PAST SIMPLE | PAST cONTINUOUS | PAST PERFECT
20.She..
(to sign) the contract before we ...
to come).
21.She.. (to cook) from two till four yesterday.
22.He.. (to do) all by 3 o'clock.
25. When l.. to meet) her, she. . (to go) to the office.
24. He.. (to wash) his face when somebody (to knock) at the door.​

20.She had signed the contract before we came.

21.She cooked from two till four yesterday. / She was cooking from two till four yesterday.

22.He had done do all/ everything by 3 o'clock.

25. When l met her, she was   going to the office.

24. He was washing his face when somebody knocked at the door.​

Объяснение: