-- _____is that used for?---_____ the floor.
-Would you like to join us in the game?-________, for I have something important to do.
I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house.
The beautiful song ________ me of those happy old days we had spent together.
I really appreciate ________ to drive me home, but I’m afraid I have to finish my work first.
Having been married for over 10 years, the couple ____ finally because they quarreled a lot.