The emergency required that all the tasks _____ at least two days ahead of time. A.to complete B.should complete C.be completed Dshould have been completed
Tom began to learn Russian by himself in _____.
--- Would you like to try _____ time? --- Sure.
Our teacher told us to write a _____ composition.
Two _____ died of cold in that country last winter.
Please wait here. I’ll be back in _____ hours.