I talked for a long time, and in the end I_____ make her believe me.
We don’t think the experiment is _______ failure. At least we have gained _______ experience for future success.
—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job? —_______ my students have a try?
We hurried all the way to the airport, only ______ that the flight had been cancelled because of the foggy weather.
—Are you pleased with what he has done? —Not at all. It couldn’t be _______. Why didn’t he put more effort into his work?
The old couple who _______ in the deserted house for ten years have been settled in a nursing home now.