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Of all the goals of the education reform movement, none is more difficult than developing an objective method to assess teachers

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问题     Of all the goals of the education reform movement, none is more difficult than developing an objective method to assess teachers. Studies show that over time, test scores do not provide a (1)______ means of separating good from bad instructors.
    Test scores are an(2)______ indicator of quality because too many factors outside of the teachers’ control can influence student(3)______ from year to year—or even from classroom to classroom during the same year. Often, more than half of those teachers (4)______ as the poorest performers one year will be judged average or above average the next, and the results are(5)______ as bad for teachers with (6)______ classes during the same year.
     (7)______, there’s a far more direct approach: measuring the amount of (8)______ a teacher spends delivering relevant instruction—(9)______, how much teaching a teacher actually gets done in a school day.
    This is hardly a new(10)______. Thirty years ago two studies using this approach found that some teachers were able to deliver(11)______ 14 more weeks a year of relevant instruction than their less efficient(12)______.
    There was no(13)______ to their success: it was obvious that the efficient teachers(14)______ strictly to the curriculum, maintained stern discipline and(15)______ non-instructional activities, like(16)______ unessential classroom business when they(17)______ focused on the curriculum.
    And both studies found that the teachers who(18)______ more were also the teachers who(19)______ students who performed well on(20)______ tests.
(1)
选项 A、persistent
B、consistent
C、continuous
D、useful
答案B
解析 词义辨析题。有两处提示，一个是这句话的时间状语over time“长期来说”，说明相关的测试方法必须是长期适用，且连贯一致的；另一个是第二段第二句话提到，超过一半得到差评的老师在下一年会被评为中等或优于中等，可见旧的测试方法无法保持前后一致。所以选B项，consistent“前后一致的，连贯一致的”。persistent“坚持不懈的，持续不断的”，当用于持续不断之意时，常用于指令人不愉快的感觉或状况，比如persistent rumors“持久的谣言”，所以可排除该项。continuous“继续不停的；不间断的”，重点强调不间断的状态，没有始终保持一致的意思，所以可排除。
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