They gave a(n)________broadcast while the performances were in process on the stage.

While there are some differences in the educational systems in many countries in the world, education itself is ______.

We were pretty _____ when we learned the _______ fact that an elephant would come to live in our school.

According to the latest research, getting enough sleep is _____ to maintaining good health and reducing stress.

 With the help of the firefighters ,the workers managed to escape from burning mine , ___________.