Open the brackets using Past Simple and Past Perfect.
1. I remembered that I (to drink) all the milk yesterday.
2. By ten o'clock yesterday. I (to learn) the poem by Byron.
3. When Elizabeth came home yesterday she saw that little sister (to break) her favorite doll.
4. Oliver (to finish) his English test by eleven o'clock.
5. I (to quess) that I (to lose) the road in the fog.
6. When Billy (to come) home, his wife already (to cook) lunch.
7. Julia (to give) me the scarf that she (to buy) yesterday.
8. Kevin (to show) his mother the composition which he (to write) yesterday.
9. Jessica (to return) from the theatre by 9 o'clock.
10. Josh (not to leave) home by 8 o'clock.

1. I remembered that I had drunk all the milk yesterday. -  Past Perfect

2. By ten o'clock yesterday I had learnt the poem by Byron. -  Past Perfect

3. When Elizabeth came home yesterday she saw that little sister had broken her favorite doll.  - Past Perfect

4. Oliver had finished his English test by eleven o'clock. -  Past Perfect

5. I guessed that I had lost the road in the fog. - (1)Past Simple, (2)Past Perfect

6. When Billy came home, his wife had already cooked lunch. - (1)Past Simple, (2)Past Perfect

7. Julia gave me the scarf that she bought yesterday. - Past Simple

8. Kevin showed his mother the composition which he wrote yesterday. - Past Simple

9. Jessica had returned from the theatre by 9 o'clock. - Past Perfect

10. Josh hadn't left home by 8 o'clock. - Past Perfect

Объяснение:

Past Perfect  - всегда указывает на событие, которое завершилось к моменту в , но при этом нет указания на конкретное время.
Поэтому в предложениях, где встречается yesterday также используется Past Simple, несмотря на то, что это событие произошло раньше другого события в предложении (например, предложение 7).

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