The country's railway system has launched online ticket-booking and a real-name ticket purchasing system, and _______ requires passengers to provide their ID numbers when buying tickets.
Next door to ours _______, who has just returned from abroad.
There was a long queue for coffee. Having waited for 10 minutes, we _______ gave up.
—Mum, I can’t see any point in studying hard. —Come on, dear. Years of hard study will surely _______ in your future career.
Public places are becoming more _______ to people with disabilities.
With a lot of difficult problems _______, the manager felt worried all the time.