Q7:
For similar cars and drivers, automobile insurance for collision

damage has always cost
more in Greatport than in Fairmont. Police studies, however, show

that cars owned by
Greatport residents are, on average, slightly less likely to be

involved in a collision than
cars in Fairmont. Clearly, therefore, insurance companies are

making a greater profit on
collision-damage insurance in Greatport than in Fairmont.
Which of the following is an assumption on which the argument

depends?

A. Repairing typical collision damage does not cost more in

Greatport than in
Fairmont.
B. There are no more motorists in Greatport than in Fairmont.
C. Greatport residents who have been in a collision are more

likely to report it to
their insurance company than Fairmont residents are.
D. Fairmont and Greatport are the cities with the highest

collision-damage insurance
rates.
E. The insurance companies were already aware of the difference in

the likelihood of
collisions before the publication of the police reports.

正确答案选A, A 为NOT WEAKEN 模式，我觉得E 也有道理，正因为E：保险公

司注意到了两者的不同，才采取措施多保Greatport，而不是Fairmont，所以

才能获利！请指正！

同意

但这更说明此题答案应该是E，如果说保险公司事先并不了解the difference in the likelihood of collisions,怎么能说他们是有意在敲客户竹杠呢？

A看起来似乎正确，但应该把A看成是题目结论成立的加强（充分）条件，而不是题目结论成立的前提（必要条件）。从A选项可以得出保险公司在敲客户竹杠，但即便A选项不成立，即Greatport的汽车维修成本的确要比Fairmont高一些，也不能完全否定保险公司敲竹杠的可能。

因此，A是support选项，E才是assumption选项。