There were instances in which lives could have been saved if ____

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There were instances in which lives could have been saved if ____.

intercommunication had been established

there had not been a delay in communication

officers' demands of information had been met

carrier pigeons had arrived in time

Giải thích

Đáp án đúng là: B

Giải thích: "there were instances in which lives could have been saved if there had not been a delay in communication"

Dịch: Có những trường hợp mà cuộc sống có thể được cứu nếu không có sự chậm trễ trong giao tiếp