It is not the strongest of the species that survives, nor the most intelligent that survives. It is ______ that is most adaptable to change.
It is worth considering what makes “convenience”foods so popular,and ______ better ones of your own.
I feel greatly honored _________ into their society.
The message is very important,so it is supposed _________ as soon as possible.
You can use that ____ tire and it is ______ .
— Is the man our sales-manager? — No, it ______ not be him he never plays cards.