The government should develop          system to predict when wildfires occur andgive warnings in time.

It is immediately obvious that water is to be _______ to the development of life.

Compared with that article, this article is           but not         _.   

Compared with her sisiter, Jerry is even more _______ to, and more easily troubled by, emotional and relationship problems.

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