-- _____is that used for?---_____ the floor.
.You can take as many as you can because they are free of ______.
.I don’t think ______ possible to master a foreign language without much memory work.
.The singer became famous in the early 1980s, ______ the classical music was better than pop music.
.---How long have you _______?---5 years.
.. --- Thanks for your help, but can you do me one more favor, please?--- ____, sir. What’s it then?