I have many friends, ______ some are businessmen.
In Disneyland every year, some 800,000 plants are replaced because Disneyland refused to _______ signs asking his “guests” not to step on them.
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?