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First of all, the letter fails to indicate who or what caused the car accidents to which the letter
refers. If Centerville High School students caused the accidents, and if those accidents would
have been avoided had these students enrolled in the high school's driving course, then the
argument would have merit. However, it is equally likely that the other drivers were at fault, or
that no driver was at fault. Moreover, it is entirely possible that the teenage drivers had in fact
taken the high school's driving course, or that they were not local high school students in the
first place. The author must rule out all these possibilities in order to conclude confidently that
a school-sponsored mandatory driving course would have prevented these accidents.
Secondly, whether the fact that several car accidents the last two years involved teenage
drivers suggests a need for a mandatory driving course depends partly on the comparative
accident rate during earlier years. It is entirely possible, for instance, that the rate of accidents
involving teenagers has been steadily declining, and that this decline is due to the availability
of the two private driving courses. Without ruling out this possibility, the letter's conclusion is
not defensible.
The argument is problematic in certain other respects as well. It assumes that a mandatory
school-sponsored course would be effective, yet provides no evidence to support this
assumption. Similarly, the argument fails to substantiate its assumption that a significant
percentage of Centerville's parents cannot afford private driving instruction for their teenage
children. Absent substantiating evidence for either of these necessary assumptions, I cannot
be convinced that Centerville should establish the proposed driving course.
In conclusion, the letter's author fails to adequately support the recommendation for a
school-sponsored mandatory driving course. To strengthen the argument, the author must
provide clear evidence that Centerville High School students caused the accidents in question,
and that a mandatory driving course would have prevented them. To better evaluate the
argument, I would need more information about the affordability of the two private driving
courses and about the effectiveness of a mandatory school-sponsored course compared to
that of the two private courses. 感谢您阅读《GRE作文范文大全（123） 》一文，出国留学网(liuxue86.com)编辑部希望本文能帮助到您。