Scientists have found evidence ________ global warming caused the world's first horses to become smaller nearly 50 million years ago.
No matter who breaks the law, he cannot _______ with it.
John, _______ university professor, is considered to be _______ success as ______ expert in the agriculture research.
---Would you mind my using your dictionary? ---________
Though you've got a tight schedule these days, I should be ________ if you could spare time to attend our meeting today.
—Can you describe a distinctive characteristic of this animal? —Its neck can be extended ________ of its body.