Although in the mid-1940s term length at black schools was approaching that in white schools, the rapid growth in another important measure of school quality, school expenditures, may be explained by increases in teachers’ salaries, and historically, such increases have not necessarily increased school quality.
23. Which one of the following statements about schooling in the United States during the mid-1940s can be inferred from the passage?
(B) The teachers in white schools had more time to cover material during a school year than did teachers in black schools.
(D) White schools did not change substantially in quality.
答案B 问COVER MATERIAL是什么意思？
B应该是无关选项吧。 它是说白人学校老师同黑人学校老师相比，白人学校老师有跟多时
间讲更多的内容.
Cover material是cover teaching materials.
LS,按你的解释，B就是正确的
因为文中说对于学期长度（TERM LENTGH）来说，黑人学校正在接近白人学校。但“接近”仍然是“少于”。
所以B对~
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