GRE作文argument时态应该用什么?

题目

GRE作文argument时态应该用什么?
比如这一题：
5) The following appeared in a letter to the editor of the Balmer Island Gazette.
On Balmer Island,where mopeds serve as a popular form of transportation,the population increases to 100,000 during the summer months.To reduce the number of accidents involving mopeds and pedestrians,the town council of Balmer Island should limit the number of mopeds rented by the island's moped rental companies from 50 per day to 25 per day during the summer season.By limiting the number of rentals,the town council will attain the 50 percent annual reduction in moped accidents that was achieved last year on the neighboring island of Seaville,when Seaville's town council enforced similar limits on moped rentals.
在叙述的时候用什么时态?引用文中作者的话来说S 和B岛的政策用什么时态?感觉好乱

答案

这个你叙述（除了很明确的有过去时态的之外）,使用一般现在时就可以了
引用作者的话使用一般现在时就可以