【单选题】

听力原文： While a new school term is about to begin, perhaps we should reconsider the matter of examinations. In July, two writers praised the cancellation of exams because they believe 'tests don't tell the whole story.'

As a teacher who has worked in four countries, I have had the experience that a student who earns good marks is generally a good student, and that a student's final mark in a subject is usually a grade average of the year's work. Of course there are exceptions, but they do not have the frequency that would give an unfair picture of a student's ability.
The simple fact is that proper class work, diligent exam studies and good marks are almost certain indicators of a student's future performance. The opposite is, almost certainly, incompetence.
There is no acceptable substitute for competition and examination of quality. How can teachers and future officials determine what a student has learned and remembered? Should we simply take the student's word for it? Any institution that 'liberates' students from fair and formal exams is misguided, if not ignorant. And surely the 'graduates' of such institutions will lack trustworthiness, not to mention being rejected by foreign universities for graduate or other studies.
When all is said and done, I sense that a fear of failure and a fear of unpleasant comparison with others is at the bottom of most ban-exams talk. Excellence and quality fear nothing. On the contrary, they seek competition and desire the satisfaction of being the best.
(33)
A．Exams don't tell the whole story.
B．Tests can not effectively measure students' abilities.
C．The cancellation of exams should be praised.
D．The two writers mentioned in the passage hold wrong conception of exams.