By the end of the last month, I_________all the CDs Of Justin Bieber.
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
It’s already 10 o’clock. I wonder how it ______ that she was two hours late on such a short trip.