Помогите пожалуйста срочно!! Задание 2 и 3

Question

Помогите пожалуйста срочно!!
Задание 2 и 3

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Answer 1

1) had done / found
2) didn't laugh / had heard
3) left / had had
4) discovered / had taken
1) rang
2) had disappeared
3) had started
4) started

Answer 2

2.
1) had done / found
2) didn't laugh / had heard
3) left / had had
4) discovered / had taken

3.
1) rang
2) disappeared
3) had started
4) started
Попробуйте так, но не особо уверен в 2-3 и 3-2.