To be sure, the new cut in interest rate（利率）is _______ to improve economic performance in all these fields.

I have been convinced that the print media are usually more ____and more reliable than television．

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

The result is not very important to us，but if we do win，then so much ________.

The preschool children who watch TV programs with violent scenes are more likely to have sleep problems than those who watched programs        for the age.