Task 2 (10 points)
Fill each of the numbered gaps in the following passage with the most appropriate word from the wordbank. Use only one word in each space. Write the appropriate letter in the gap. The task begins with an example (0). Note that there are more words than gaps.
RIDDLE OF THE ROYAL DIAMOND SOLVED
Scientists may finally have (0) I the mystery of the Cullinan diamond, the most (1) of the Queen’s crown jewels, whose massive size and purity have long seemed to (2) the laws of physics. Ever since it was (3) in South Africa in 1905 experts have been puzzling over how the Earth (4) a gem of such clarity. All other diamonds are smaller or chemically less pure. Now scientists have found that the Cullinan’s (5) may have been as spectacular as its current setting. Their research suggests it was born four times closer to the centre of the Earth than other diamonds – and was then shot to the (6) in an explosive volcanic eruption. Such (7) include temperatures of 1,500°С and pressures of 250,000 atmospheres. This is far deeper than where common diamonds form. At this (8) Earth makes diamonds to a different recipe – so they grow very pure and large. The crown jewels (9) from 1660 and are now kept at the Tower of London under top security. These security measures mean scientists have never been able to (10) the Cullinan – a reason why its beginnings have remained so mysterious.