综合写作：
The continent of Australia has been inhabited by Aboriginal people for many thousands of years. Most historians believe that no Europeans visited Australia until 1606. Recently, however, some historians have questioned that belief, suggesting that sailors from the European country of Portugal in fact reached Australia as early as the 1520s. They cite several pieces of evidence.
First, a series of European maps produced around 1550 depicts a large landmass to the southeast of Asia where we now know Australia to be. These maps, made by professional mapmakers, showed rivers and coasts labeled with Portuguese place names and were sold to wealthy and royal patrons. Some historians consider this reliable evidence that the Portuguese visited Australia in the early 1500s.
Second, there is evidence that Europeans had knowledge of Australian animals before 1606. One illustrated page of a European book published in 1593 features a picture of a marsupial. Marsupials are mammals that are typical of Australia (kangaroos are marsupials, for example). Female marsupials have pouches in which they carry their young. The 1593 book depicts a marsupial with two young animals seeking out of their mother’s pouch. This strongly suggests that some Europeans had been to Australia before the book’s publication.
Last, some artifacts found in Australia suggest that Europeans were present there in the 1500s. Archaeologists working in Northern Australia discovered a set of European-made metal keys while excavating a site. A common method of dating objects found in the ground is to analyze the soil in which the objects are buried. In this case, the soil where the keys were located is thought to date to the 1500s. This suggests that the keys were dropped at the site at some point in the 1500s.
学术写作：
Instructions
Your professor is teaching a class on health and nutrition. Write a post responding to the professor’s question.
In your response you should do the following:
- express and support your personal 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 eating habit that you think is 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 learn about what you’re putting in your body, the more likely you’ll be to make good decisions.
