The scientists are now trying to discoverthat use could be _________ such material.

Lin Zhiying is 39 years old. But he looks even _____ than a college student.—- Yes, he is one of my _____.

I’ve _____ all my papers but I still can’t find the contract.

29Don’t touch anythingBetter leave things_________they are until the police arrive

John was very upset because he was_______ by the policewith breaking the law.