U.S. News ____________ rankings of colleges since 1983. They are a very popular resource for students looking to apply to university campus.
D
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We can hear____from the back of the room.
Time _____, the celebration will be held as scheduled.
Itisnotuncommonforthere_____problemsofcommunicationbetweentheoldandtheyoung.
Theopeningceremonyisagreatoccasion.Itisessential_____forthat.