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Задание 2 и 3

2.1) had done / found2) didn't laugh / had heard3) left / had had4) discovered / had taken3.1) rang2) disappeared3) had started4) startedПопробуйте так, но не особо уверен в 2-3 и 3-2.

1) had done / found2) didn't laugh / had heard3) left / had had4) discovered / had taken1) rang2) had disappeared3) had started4) started