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解析：-t-2tan t。
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It’s certain that the following tale is a nice example that can teach us a good lesson. One day, a young man 16 begged from door to door along the street. 17 an old wallet in hand, he was asking for a few coins to buy something to eat. He kept complaining about his bad 18 and kept wondering why those who had so much money were never 19 and were always desiring more. “As for me, if I had only enough to eat and to wear, I would not want anything more." Just at that moment Goddess Fortune 20 the beggar among the crowd and approached him, greeting, “Hi, young man, I have wished to 21 you for a long time. If you open your wallet, I will pour my gold into it. But keep in mind that I will do that only on this 22 : All that falls into the wallet will be pure gold belonging to you; but every piece falling upon the ground 23 become dust, worth nothing. Are you clear?” “I see. Now I’m ready. ” said the beggar with confidence. “Then you should 24 ! It’s obvious that your wallet is a/an 25 one, so don’t load it too heavily,” said the Goddess Fortune. The excited beggar could hardly 26 to have gold. He quickly opened his wallet, and a 27 of yellow coins was poured into it. The wallet became heavier and heavier. “Is that enough? Isn’t it cracking? Will your wallet strong enough for more?” warned the Goddess. “Never 28 .It’s still strong enough now” replied the beggar firmly. The wallet was filled with so many coins that the beggar’s hands began to 29 . “Ah, if only the golden stream would 30 forever! Just a little more,” said the beggar, “ 31 just a handful or two.” “There! It’s full. The wallet will 32 .” warned the Goddess again, but the beggar insisted, “ I know it will 33 a little more, just a little more.” One more piece was added and the wallet split. The 34 fell upon the ground and became dust. The greedy beggar had now 35 but his broken wallet.
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