问题补充：
We should consider the students’ request the school library provide more books on popular science.
A. when
B. which
C. that
D. where
答案：
A. when
B. which
(答案→)C. that
D. where
解析：考查that引导的同位语从句，解释名词request，句意：我们应该考虑学生们的请求就是学校的图书馆应该提供更多的关于流行科学的书。所以选C。
