---So you've left the classroom key inside again?---No.I've got it with me this time,but I have forgotten ______ the door?
The Smiths have three daughters, one a baby, and ________ twins of twelve.
Freddie was speaking on ________ end of the line.
Some of the wheat came from Canada. How about ________ ?
Of all the movies I have seen ________ is more memorable than Titanic.
—He has two brothers and three sisters. Do you know ________ of them? —No, I know ________ of them.