完形填空

King Hiero asked a crown-maker to make him a gold crown, 1when the king got the crown, he asked himself, “Is the crown made completely   2  gold?”

  Then the king   3   the crown to Archimedes, the   4   scientist in the kingdom. Archimedes thought about the problem   5    a slave poured some water into a bath for him. Archimedes got in the bath and some water came out of it,   6    the floor.

  “That’s it!” shouted Archimedes. “Some of the water will move out when we put an object in water. The object displaces the water. A big object will displace a lot of water. A small object will displace only a little water.” Archimedes was very  7  .

  Archimedes went to the palace to   8    the crown . It weighed only one kilogram. He put the crown in a pot of water. Five centimeters of water came out. Then he put one kilogram of gold in another pot of water. Three centimeters of water came out. Archimedes said to King Hiero, “Silver made the crown bigger. The crown displaced   9  water so it was not made completely of gold. It was made of both gold and silver.”  

  King Hiero became very   10   when he heard this, and then he sent the crown-maker to prison.