综合写作：
ETS TOEFL
Writing | Question 1 of 2
Eurasian milfoil is an invasive aquatic plant species that was brought to North America in the 1940s. It is now found in lakes across the United States and spreads very quickly, often covering a lake’s surface and threatening the growth of native plants. It can also reduce fish populations and make recreational water activities difficult, as the plant grows too thick to allow boating or swimming.
To address these problems, scientists have proposed a number of ways to eradicate Eurasian milfoil.
Manual Removal
One option is to physically remove the plant from lakes. This can be done by groups of people using their hands or simple instruments. Manual removal is a good option because it does not require any specialized knowledge or experts; volunteers can easily work together to cut or pull out the milfoil.
Beetles
Another method is biological control—finding an animal that feeds on milfoil and releasing it into infested lakes. For example, there is a species of native beetle (insect) that can feed on the invasive milfoil. The beetle lives in most areas where the invasive milfoil has become a problem, so using these beetles to control the milfoil would be a natural and inexpensive way to address the problem. Scientists would simply need to release additional beetles in the infested areas to remove the invasive plant.
Herbicides
Lastly, it is possible for experts to apply aquatic herbicides—chemicals that are toxic to water plants and stop their growth immediately. Certain herbicides have been specifically designed to target species like milfoil. Such herbicides can be very effective and can quickly eliminate Eurasian milfoil once they have been distributed throughout a lake.
学术写作：
Your professor is teaching a sociology class. 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
To continue our discussion of the health benefits of good nutrition, I’d like you to consider the broader topic of eating habits—not just what people eat and drink, but how often, how much, and when. Those who want to improve their health often begin by changing some kind of eating habit. This includes a wide range of behavior. What is one poor eating habit that would be important for most people to change, and why?
Kelly
If people could start with one change to improve their eating habits, it would be to eat a better breakfast. Most people are so rushed in the morning that they don’t take the time to sit down and eat a balanced meal. A good breakfast gives you more energy all day and keeps you from eating too much later on.
Andrew
I think most people don’t bother to learn much about the food that they eat. This ignorance is a kind of bad eating habit. It can be burdensome, but you should try to read every food package label. The more you can learn about what you’re putting into your body, the more likely you’ll be to make good decisions.
