综合写作：
The Everglades are a wetlands ecosystem in the state of Florida in the southern United States that has an abundance of unique plant and animal life. In recent decades, the Everglades have been beset by environmental problems that have done damage to their ecological health. The problems are serious enough to threaten the Everglades’ future.
One problem is the spread of invasive plants. These are plants that have been introduced into the Everglades from another part of the country or the world. Their spread harms the native plants and animals. For example, invasive cattails (grasslike plants) have been crowding out native plant species such as the saw grass; cattails grow too tall and thick for many bird and reptile species to nest in.
A second environmental problem is the drying of the Everglades. Most of the region has historically been water covered, marshy, and damp. But recently, the amount of water in the Everglades has decreased. This has made it difficult for some native plant species to survive, especially plants that are specifically adapted to a wet habitat. In some places the soil has become so dry that it has turned to dust.
A third environmental issue that troubles the Everglades is the presence of high levels of mercury, a toxic metal, in the ecosystem. The levels are high enough to pose a danger to all life in the region, as it has been proven that even some very large animals in the Everglades have died of mercury poisoning. The threat of mercury affects not only the wildlife, but people who eat fish they have caught in the Everglades.
学术写作：
Your professor is teaching a class on business management. Write a post responding to the professor’s question.
In your response, you should do the following:
- Express and support your opinion.
- Make a contribution to the discussion in your own words.
An effective response will contain at least 100 words.
Dr. Gupta:
This week, we’ll be discussing ways in which schools can help expose their students (aged 5 – 18) to learning experiences beyond the classroom. Let’s begin by discussing one popular idea that some schools are considering—offering outdoor classes once a month. On the day of outdoor classes, students would be transported to local parks or nature preserves, and teachers can help students explore nature and learn about the environment. Do you think this is a good idea? Why or why not?
Kelly:
Having outdoor classes once a month seems like an exciting way of providing students with interesting hands – on experiences. However, I don’t think these classes would be a worthwhile use of instructional time and school resources. These classes could put substantial pressure on the school’s financial resources and on teachers, who may have to redesign their lesson plans.
Paul:
On the other hand, outdoor classes can increase students’ motivation to learn about the interconnectedness of the natural world. These classes could provide great opportunities to teach students about pressing environmental issues, such as pollution, and ways to address these problems. It would deepen their understanding beyond what books alone could achieve and would be time well spent.
