—I hear you __________ in a pub. What's it like?—Well, it's very hard work and I'm always tired, but I don't mind.
Scientists and doctors across the world have done _____ research over the years, hoping to find a cure for cancer.
I don’t think _________ possible to master a foreign language without much memory work.
She has already tried her best. Please don’t be too ______ about her job.
Food safety _____ to customers, which should be the minimum requirement for the food industry.
His being late for the performance __________ a complete failure