综合写作：
Dengue is a serious viral disease that is typically spread by a mosquito called Aedes aegypti. The spread of dengue could be controlled by reducing Aedes aegypti populations. A biotechnology company has devised a way to achieve that: it has created a genetically modified (GM) Aedes aegypti. When the GM mosquitoes reproduce with wild mosquitoes, the mosquitoes in the next generation are defective and cannot survive. Releasing the GM mosquitoes to the wild would therefore reduce the population of Aedes aegypti and limit the spread of dengue.
However, there are critics who believe that the plan to release the GM mosquitoes is potentially very dangerous and should not be put into practice.
Other Mosquitoes May Increase
First, the Aedes aegypti mosquito is not the only mosquito that can spread dengue. Other, rarer mosquito species carry even more powerful versions of the dengue virus. The critics suggest that if the Aedes aegypti population is reduced, populations of other mosquitoes could increase to take their place and then would spread more dangerous forms of the virus.
GM Mosquito Bite Could Be Dangerous
Second, the critics are concerned about what might happen when
the GM mosquitoes bite people. The mosquitoes are genetically
engineered to produce a defective protein—that is why their
offspring die. If the defective proteins are passed to people when the
GM mosquitoes bite them, we do not know what the effects might
be.
Unforeseen Ecological Effects
Third, there are concerns that introducing any genetically
modified organism into an ecosystem might have unforeseen
negative consequences. There are examples of this: the population
of one type of butterfly was reduced by half after GM crops were
introduced in areas where it lives. Introducing GM mosquitoes might
have unforeseen ecological effects as well.
学术写作：
Instructions
Your professor is teaching a class on sociology. Write a post responding to the professor’s question.
In your response you should:
- 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
We’ve been talking about the process of starting a new business. One of the most important aspects of the process is staffing – that is, deciding which people to hire. Please answer the following question: Is it better for new businesses to hire experienced veterans of the industry or to staff the business with younger employees who are right out of university? Why do you think so?
Claire
I think a company should staff a business with the most experienced employees possible. If you’re starting a new business, you need people around you who know what they are doing and can quickly get the business up to speed. Spending time training inexperienced people will slow you down.
Paul
I understand what Claire is saying, but if you are starting a new business, you want people who are particularly enthusiastic and energetic. Who better than a recent graduate to bring those qualities to the job? You’d be guaranteed an ambitious hard worker.
