My father used to to work on foot, but now he is used to to work by bike.
Look at the ______, sir. The white shirt is larger than the yellow one.
The red suitcase is expensive ______it’s made of leather.
Could you show me how to ________ this new recorder?
Some people think that CD-ROMs will soon be _________ books.
I didn’t _____ you were going to leave_____ 3 o’clock.