Mr. Green has two sons, one of _____ working as a bus driver now.

I gave the papers to every one of the class, except, of course, the ___________who had already come to the office to collect_________.

 My visit to your school is really an unforgettable experience,         I will always treasure.

 They want to make _______ clear to the public that they are doing an important and necessary job. 

We've got two TV sets, but we still can't watch anything because ______ works properly.