人教高中英语复习课堂练习41 ：选择性必修4 Unit 5　Into the unknown Word版含解析.doc

课时质量评价(四十一)
选择性必修第四册　Unit 5　Into the unknown
A组·基础巩固
Ⅰ. 语法填空
A
Today we know Antarctica as an extreme environment 1. ________ (contain) ice and snow. But new research provides evidence that the area was very different in the past, 2. ________ was found inside a piece of Earth sediment (沉淀物) gathered by researchers 3. ________ under the seafloor off the coast of Antarctica.
In the sediment, they 4. ________ (find) forest soil estimated to be about 90 million years old and this would have been in the Cretaceous Period, when dinosaurs were the main land 5. ________ (animal). Johann Klages, who was the lead writer of a study on the findings 6. ________ (publish) in the journal Nature, said the sediment collection was from 7. ________ depth of about 30 metres below the ocean floor. Klages said an examination showed that the material formed on land, not in the ocean.
The Earth has experienced in the past and is 8. ________ (current) undergoing today. The researchers said that the rainforest environment in Antarctica was especially surprising, because each year the area 9. ________ (experience) a four­month polar night when there is no sunlight to fuel plant life. Klages said no ice sheets were present during the time, but 10. ________ (season) snowfall was likely.
【语篇解读】本文是一篇说明文。研究人员从南极洲海岸附近的海底收集的一块泥土沉积物中发现：这些沉积物是在陆地上形成的。
1. containing　考查非谓语动词。分析句子结构可知，句中已有谓语动词，此处应用非谓语。主语Ant