Are you going to climb the mountain tomorrow–Yes. But if it ______, I_______ at home.

The real evidence is the least of our worries ______ we have known about it.

Mr. Jones isn’t at his desk. Where is he—_______. I have no idea.

Maybe if I________ science, and not literature then, I would be able to give you more help.

I usually sleep with the windowopen _____ it’s very cold.