Скорее всего , что так
1-1-1,2
2-1-8,3
3-1-5,4
4-2-6,7
2-she had walked the dog, by the time her mum came home.
3-she hadn't taken out the rubbish, by the time her mum came home.
4-she had taken clothes to the laundry, by the time her mum came home.
5-she hadn't tidied her room, by the time her mum came home.
6-she hadn't dusted the furniture, by the time her mum came home.
1 - b
2 - a
3 - a
4 - c
5 - b
6 - c
7 - d
8 - b
9 - c
10 - b
11 - d
12 - c
13 - d
14 - c
15 - a
16 - b
17 - a
18 - a
19 - b
20 - b
1. Before
2. Already
3. By
4. Just
5. By the time
6. After
7. Because
8. Yet
1. Heard
2. Didn't expect
3. Saw
4. Wasn't
5. Leaved
6. Haven't seen
7. Got
8. Survived
9. Rescued
10. Had recovered
11. Thinks