Today's __________ of birth control make it possible for a couple to choose whether or not to have a child.
There are ten boxes on the desk and the ______ is yours.
What ______ heavy snow. Let's go out for a walk in ______ snow, shall we?
It is pleasant to play ______ game of ______ table tennis ______ summer afternoon.
When we saw his face, we knew _____ was bad.
Biology is _____.