《2025年实验班全程提优训练高中英语必修第二册人教版》

Ⅵ. (2025·河北衡水期末)七选五
主题语境: 人与自然 语篇类型: 说明文 建议用时: 8
The current population of oysters (牡蛎) is only a small part of their historic levels. 1. ______F. To help maintain existing habitats, the state requires licences for the harvesting of shellfish and controls where and when the harvesting activity can take place. South Carolina's Department of Natural Resources has also planned to recycle and replant oyster shells.
2. ______G. They serve as anchors to which babies can attach themselves. Returning shells to the state's rivers ensures that any larvae(幼虫) looking for a home can find something to which they can be attached.
The critical nature of oysters in the ecosystem is difficult to overstate. Along the Atlantic shoreline of the United States, the Eastern Oyster is considered a foundation species. Oysters gather together as part of their natural life cycle, forming reefs that provide the habitat for fish, crabs, and other small ocean creatures. 3. ______B.
In addition to being the bedrock of many underwater communities, oysters also help maintain the cleanliness of South Carolina's coastal waters. Dirty water comes in from the ocean and gets filtered by oysters. Water goes back out cleanly. 4. ______D. Tourists want to go to beautiful and clean beaches, come out on boat trips, and see dolphins.
South Carolina is working hard to rebuild coastal reefs that will support and sustain future oyster populations. It's worth keeping in mind that every shell removed from the river could be the base for the next year's new oysters. 5. ______A, it's going to be a long time before we get enough recruitment(增长) in the oyster population to keep it sustainable.
A. Once we lose that natural shell base 
B. These little tiny fish need somewhere to hide 
C. Because it is important to recycle the oyster shells 
D. Even the local tourism industry relies on this effect of oysters 
E. The best place to settle is going to be where there are adult oysters 
F. South Carolina is actively working to restore and sustain its wild oysters 
G. Oyster shells, both live and dead, provide the main habitat for the next generation 

答案： 1. F 2. G 3. B 4. D 5. A