Argument写作入门-开头段第二步：根据题目要求写主旨句

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这是开头段第一步的作业
https://bbs.gter.net/forum.php?mo ... age=3#pid1779250759

下面三个练习还是第一步作业的继续

练习一
7. The following is a recommendation from the Board of Directors of Monarch Books.
"We recommend that Monarch Books open a café in its store. Monarch, having been in business at the same location for more than twenty years, has a large customer base because it is known for its wide selection of books on all subjects. Clearly, opening the café would attract more customers. Space could be made for the café by discontinuing the children's book section, which will probably become less popular given that the most recent national census indicated a significant decline in the percentage of the population under age ten. Opening a café will allow Monarch to attract more customers and better compete with Regal Books, which recently opened its own café."

Write a response in which you discuss what questions would need to be answered in order to decide whether the recommendation is likely to have the predicted result. Be sure to explain how the answers to these questions would help to evaluate the recommendation.

开头
The Board of Directors of Monarch Books recommend that its bookstore open a cafe by replacing the children's books section that will probably be less popular due to population change. The speaker further argues that  an in-store cafe will attract more customers and thus gain an edge in the competition with Regal Books which owns a cafe as well. However, the recommendation leaves a few questions unanswered which are crucial in assessing its validity, including the applicability of the census cited, customers' demand for an in-store cafe as well as the comparability of the two bookstores mentioned.

练习二
55. The following appeared in an editorial in a business magazine.
"Although the sales of Whirlwind video games have declined over the past two years, a recent survey of video-game players suggests that this sales trend is about to be reversed. The survey asked video-game players what features they thought were most important in a video game. According to the survey, players prefer games that provide lifelike graphics, which require the most up-to-date computers. Whirlwind has just introduced several such games with an extensive advertising campaign directed at people ten to twenty-five years old, the age-group most likely to play video games. It follows, then, that the sales of Whirlwind video games are likely to increase dramatically in the next few months."

Write a response in which you examine the stated and/or unstated assumptions of the argument. Be sure to explain how the argument depends on these assumptions and what the implications are for the argument if the assumptions prove unwarranted.

开头
An editorial predicts a rapid boom in Whirlwind newly launched vedeo games based on a survey indicating customers' preference which Whirlwind's products suit well, and Whirlwind's well-targeted advertising campaign. The prediction relies on several assumptions about the reference value of the survey and the consumption ability of its potential customers. These assumptions need to be examined carefully in order to decide whether the argument is sound or not.

练习三
78.  The following appeared in a memo from the vice president of a food distribution company with food storage warehouses in several cities.
"Recently, we signed a contract with the Fly-Away Pest Control Company to provide pest control services at our fast-food warehouse in Palm City, but last month we discovered that over $20,000 worth of food there had been destroyed by pest damage. Meanwhile, the Buzzoff Pest Control Company, which we have used for many years, continued to service our warehouse in Wintervale, and last month only $10,000 worth of the food stored there had been destroyed by pest damage. Even though the price charged by Fly-Away is considerably lower, our best means of saving money is to return to Buzzoff for all our pest control services."

Write a response in which you discuss what specific evidence is needed to evaluate the argument and explain how the evidence would weaken or strengthen the argument.

开头
The vice president argues that their food distribution company return to Buzzoff Pest Control Company, which is the best means of saving money. To support his or her assertion, the speaker adduces evidence referring to financial loss the previous month at two food warehouse serviced respectively by Fly-Away and Buzzoff, which indicated the latter performed better.  To better assess the argument, however, we need evidence regarding the amount and nature of the food stored in the two warehouses, detailed historical records of pest damage and geo-climatic comparison between the two districts.