由中科院上海药物所自主研发的我国第一个具有自主知识产权的国家一类氟喹诺酮类（沙星类）

用方框中所给单词的适当形式填空，使短文正确、通顺、连贯。（每词限用一次。10分）

come back, go out, pay back, say, find, last, return, lose, take, tell

One day, my good friend Tom put his wallet in his bag. He put his bag in the classroom and __1__ to the playground. When he __2__, he could not find his wallet. So he __3__ some of his classmates. Soon the whole class learned that Tom __4__ his wallet with a lot of money in it. He was sure that one of his classmates __5__ his wallet away, but no one returned it to him.
A few days later, he __6__ his wallet in his bag with only half of the money, together with a note. It _7__, “A thief, yes, but only 50 percent a thief!” A week later, some more money __8__ to Tom with another note saying, “Only 25 percent a thief now.” In the end, all Tom’s money was __9__ in this way. The __10_ note said, “I am 100 percent honest now!”