That is the only way we can imagine _______ the overuse of water in students’ bathrooms.
—What about ____ book? —It’s too difficult ____ book for beginners.
As we all know, the Internet will let people have ______ to huge amounts of information from their own homes.
His composition was so confusing that I could hardly make any ________of it what’s over.
Without a sure supply of water, farming in that area remains at the _______of the weather.
_______ the sun sinks lower, shadow spread ________ the courtyard.