阅读下面短文，根据文章大意用所给单词的适当形式填空(未提供单词的，限填一词)，使文章意思完整、正确。 After the death of a jeweler (珠宝商), his family got into trouble because they soon ran out of money. One day, the jeweler's wife took out {#blank#}1{#/blank#} diamond watch and said to her son, "Son, take this watch which is really {#blank#}2{#/blank#} (value) to your uncle's shop and ask him to give you money." The boy went to his uncle's shop and gave the watch to him {#blank#}3{#/blank#} once.
His uncle looked at the watch carefully. After a while, he looked up and said, "Son, tell your mother that the market is not good right now. She {#blank#}4{#/blank#} (have) better sell it later." Then his uncle gave him some money and asked him to come the next day and learn to work with him.
From the next day, the boy started to learn how {#blank#}5{#/blank#} (examine) jewels. With great intelligence and hard work, he finally became the {#blank#}6{#/blank#} (famous) jewelry examiner in the city. One day, his uncle was happy to say to him, "Son, go home and tell your mother that she can sell that diamond watch now." The boy went home for that watch. {#blank#}7{#/blank#} he examined it, he found that it was not a real diamond watch.
He went to his uncle's and said, "I didn't bring that watch. Uncle, why didn't you tell us the diamond watch was not real the {#blank#}8{#/blank#} (one) time?"
His uncle replied, "Money {#blank#}9{#/blank#} (need) by you at that time. If I had told you the truth, you would have thought that I didn't want to help. But now you have knowledge about jewels, you can tell by {#blank#}10{#/blank#} (you)."
