He hurried to the booking office, only ________ that all the tickets had been sold out.
The flowers his friend gave him will die unless __________ every day.
Please remain __________ until the plane has come to a complete stop.
Jenny hopes that Mr. Smith will suggest a good way to have her written English __________ in a short period.
— Did Peter fix the computer himself? — He __________, because he doesn’t know much about computers.
John received an invitation to dinner, and with his work __________, he gladly accepted it.