Every woman dreams of receiving a huge priceless diamond. Now space scientists 1 that they have discovered the largest diamond in the universe. But it’s well beyond the reach of the most men because it’s 50light years away, to be 2 . Measuring2,500 miles across and weighing five million trillion pounds, the rock was found on Valentine’ s Day 3 in the core of a white dwarf star, and it has excited the 4 world. “It’s the mother of all diamonds”, said Travis Metcalfe, who led the team of researcher sat the Harvard-Smithsonian Centre, “and you would need a jeweler’s loupe ( 专用放大镜 ) , the size of the Sun, to 5 this diamond.” The largest diamond 6 on earth was the 3,106-carat ( 克拉 ) Cullinan. It was cut into nine major stones, including the 530-carat Star of Africa, now a part of the CrownJewels. Diamonds were 7 discovered inIndiamore than 2,800 years ago. TheAncient Romans questioned that the stones were broken pieces of stars that had 8 to earth. In Ancient Egypt, diamonds were used in funerals. In the Middle Ages, men 9 them to symbolize their courage and strength. The 10 of giving them as presents dates from 1477,when Maximilian, the prince of Austria, gave a diamond ring to Mary of Burgundy . A. fallen B. burned C. wore D. tradition E. material F.first G. reveal H. buried I. precise J. scientific K. cultivated L. admit M. grade N. approaching O. found