Once the airline announced its ticket sale, the te...

Câu hỏi: Once the airline announced its ticket sale, the telephone in the main office would not stop ringing.

A If the airline didn't announce a ticket sale, its telephone would stop ringing.

B Nobody called the airline until it announced its ticket sale.

C People kept calling the airline main office since its announcement of ticket sale.

D The airline telephone was ringing because they announced a ticket sale.