It is often that in sports records are made to be broken. This saying suggests records are made to be broken. This saying suggests there is no limit to athletic performance.
We don’t care if a hunting dog smells _____, but we really don’t want him to smell ____.
“Did Jim come?” “I don’t know. He _______ while I was out.”
“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”
“Show me your permit, please.” “Oh, it’s not in my pocket. It ______.”
“Is there a flight to London this evening?” “There _______ be. I’ll phone the airport and find it out.”