-- _____is that used for?---_____ the floor.
With a large amount of work ______, the chief manager couldn’t spare time for a holiday.
You have no idea what I’ve had to ________ during the last few days.
Mr. Smith has a great interest in_______history, especially in_______history of the Ming Dynasty.
–I’m quite nervous about tomorrow’s oral English Test. --_________.
Doctor Smith has made another wonderful discovery, _______ great importance.