题目说许多大学英文文学graduate program都要求enter students have taken at least 一本莎士比亚的著作的课。However, 这些年the proportion of college undergraduate program that require students to take at least 这样的课 is declining. 所以说，这些年来the proportion of students who meet the graduate program requirement is declining.问assumption
a) the proportion of graduate students has not increased during recent year
b) the proportion of graduate program has not decreased during recent year
c)For colleges who still require students to take such class, 很奇怪，这道题后面的信息好象又跟那个no.无关。
d) for colleges who do not require students to take such a class, not all such students take them voluntarily (这个选项很绕。它的说法。）
e) 无关选项
这道题目我觉得最好的assumption是：学校没有require,学生就不会自愿去take.
要不然就是没有这么要求地学校，学生数量增加了。
所以就是C或者D.可是D却说not all such student,好象就是说还是有人会去take的。。
结果我时间来不及了。神差鬼使好象就选了D了。。
我觉得好象又错了。。因为接下来就变阅读了。很简单的
(((((