1 . Many people have come to realize that they should go on a ________ (balance) diet. （所给词的适当形式填空）

2 . The new project will be ______ (benefit) to the villagers. (所给词的适当形式填空)

3 . John was presented with his award at a ceremony which recognized the ________(brave) of ten people. (所给词的适当形式填空）