1. which
2. would volunteer
3. don't have to/shouldn't оба не ошибка, "Мы не обязаны работать, сегодня выходной" и "Мы не должны работать, сегодня выходной"
4. will lose
5. had studied, опять технически вариант б не ошибка, в задание не указано время
1 - d
2 - a
3 - g
4 - f
5 - b
6 - c
7 - h
8 - e
b)
1. have
2. live
3. take
4. write
5. do
6. learn
7. spend
8. move
Angelina is Jon's daughter
Enrique is Julio's sun
Tim is Helena's husband
Michael is Janet's brother
Cats, dogs, parrots and foxes.