According to the passage, one important change in United States education by the 1920’s was that ______.
A) most places required children to attend
B) the amount of time spent on formal education was limited
C) new regulations were imposed on nontraditional education
D) adults and children studied in the same classes
正确答案：A
答案：A
[试题分析]细节判断题
[详细解答]文章第二段指出：By1920schoolingtoagefourteenorbeyondWascompulsoryinmoststatesandtheschoolyearWasgreatlylengthened显然可以判断A为正确答案
