大学英语六级18

29.

A. Diamond-producing rivers are disappearing because of climate change.

B. Diamond couldn't be formed without great heat and pressure of the volcano.

C. Earthquakes brought some diamonds up to the surface of the earth.

D. Explosion of the volcano can damage diamonds as well.

30.

A. Under the river bed.

B. On the floor of the sea.

C. In the volcanoes.

D. At the foot of the mountains.

31.

A. They never came back home with desired diamonds.

B. They lost the hard-earned diamonds on their way back.

C. They were sentenced to death for stealing diamonds.

D. They returned home as content as millionaires.

32.

A. South Africa.

B. Eastern Russia.

C. India.

D. Congo.