— It is a pity that we have nothing to refer to when we come across new words.— I quite agree with you. There isn't any dictionary around when we need ______.

I certainly consider _____ important that everything in the competition should be fair and open.

 I have bought a good book, ______ that will surely interest         of the students．

There is        as good as the taste of a fresh apple, especially in the fall.

 ______ is necessary for everyone to obey the traffic rules.