In Disneyland every year, some 800,000 plants are replaced because Disneyland refused to _______ signs asking his “guests” not to step on them.
A. put down B. put out C. put off D. put up
We don’t think the experiment is _______ failure. At least we have gained _______ experience for future success.
A. the; a B. a; an C. a; / D. /; the
—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?
A. May B. Must C. Shall D. Will
We hurried all the way to the airport, only ______ that the flight had been cancelled because of the foggy weather.
A. being told B. to be told C. having told D. to have been told
—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?
A. any worse B. much better C. so bad D. the best
The old couple who _______ in the deserted house for ten years have been settled in a nursing home now.
A. lived B. have lived C. had lived D. have been living
