While he_____ on the phone, a man walked into his room.

At the weekend I often go to the bookshop ________ new books.

The great writer has written many stories for children. It is said that a new one will ______ at the end of this month.

How do you find that Beatles’CD?—Wonderful. It’s well worth ______.

We have two foreign teachers here. One is from England, and ______ is from America.