Although it seemed to be ______ uncomfortable experience, he still found it ______ fun to learn diving.

----- Mr Green is ___ teacher. He is ___English teacher.

In the United States, Father's Day falls on ________ third Sunday in ________ June.

 —Do you know      man in blue? —Yes, he is a professor of Jiangsu University.

--- Have you ever seen _____ one-eyed elephant ?--- No, never. And you?