30. —This wall of air is an effective answer to the problem and it ______ work. —But it is a question to put such a wall of air around the statue.
The country music is worth ___.
_______ felt funny watching myself on TV.
In order to find _______ better job, he decided to study _______ second foreign language.
The house rent is expensive.I’ve got about half the space I had at home and I’m paying _________here.
I think the talk given by the old scientist is ______ worth ______.