My father admitted that when          comes to pop music, he had little knowledge of it. 

Of all the books on the desk,       is of any use for our study.

Of all my friends ____will be able to persuade Tom to change his mind. He is so firm upon it.

. --- Did ________ get through the driving test? --- No, ________. A few failed.

Believe it or not, no bread eaten by us is so sweet as ___________ earned by our own labour.