Question

Strange stones of Costa Rica

One of the strangest mysteries in archaeology was discovered in the Diquis River Delta, in southern Costa Rica. Since the 1930s, hundereds of stone balls have been found. They range in size from a few centimetres to over two metres. Who made these perfect spheres (球体) and how they made them remains a mystery. Some researchers believe the stones were made by extreme heating followed by cooling. People could have polished the spheres with sand or leather. The ancient Costa Ricans had no written language so there is no written record of just how they made the spheres, Almost all are made of granite (花岗岩), a hard stone created by volcanoes. The granite quarries (采石场) were 25 to 30 miles away from the largest stones, which weigh more than 10 tons each. Nobody knows how people moved them. Many of the stones have been found near the remains of houses or graves. Some believed that the stones contained hidden treasures and a few have been smashed but nothing has been found inside. Despite these losses, the National Museum of Costa Rica has recorded 130 spheres. However, many stones are not included because they have been removed from their original sites and used as ornaments(装饰) in homes, gardens and churches. Clearly, there are also many stones that lie undiscovered.

 

56. The stones were discovered ________.

       A. near the volcanoes                  B. in the south Costa Rica

C. in a grave                               D. in churches

57. The writer ________ in this passage.

       A. admires the spheres very much 

B. doesn't believe the spheres were once made by humans

C. tells us a discovery

D. thinks highly of the spheres

58. The underlined word “polished ” refers to ________.

       A. buried              B. wrapped           C. made shining    D. made big

59. According to the passage, which of the following is TRUE?

       A. The stone balls found in the Diquis River Delta are all very huge.

B. The stone balls were unearthed in the graves.

C. The local people show great interest in the stone balls.

D. There are a lot of treasures in the stone balls.

60. The passage mainly tells us ________.

       A. the stones are of great value

B. the stones proved to be made by non-humans

C. the stones are a mystery

D. the stones are ornaments

Answer 1

BCCCB