大全II - 16

Instead of blaming an airline accident on pilot error, investigators should find out why the error was made by analyzing airplane design, airline management, and pilot-training programs. For only then can changes be made to ensure that the same type of error does not recur and cause another accident.

Which of the following is a presupposition of the argument above?

(A) Pilot error is not a contributing factor in most airline accidents.

(B) Airline companies themselves should be the agents who investigate airline accidents.

(C) Stricter government regulation of airline companies will make air travel significantly safer.

(D) Investigators of airline accidents should contribute to the prevention of future accidents.（D）

(E) Most pilots who make errors in flying will repeat their errors unless they are retrained.

答案是D为什么A不对？

因为如果不讲出investigator有责任在了解飞机失事的机械原因后提出改进意见，就无法保证有“change”to be made，以至能减少事故发生。而A只讲说pilot errot不是飞机事故的主要原因，与后面的argument中提到的prevention联系不大

楼主注意两个词

A里面的most

D里面的should