ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО ДАЮ 15 БАЛОВ

Ответ:

The tourist hadn`t visited the museum before they went on a trip

The postman had delivered the mail by 4 o`clock

Helen hadn`t heared the news until Sam told her

The children hadn`t eaten dinner by lunchtime

Adam had finished writing before he watched TV

Объяснение: