问题补充：
Great changes have taken place in that school. It is no longer it was 20 years ago, it was poorly equipped.
A. what; when
B. that; which
C. what; which
D. which; that
答案：
A. what; when
B. that; which
(答案→)C. what; which
D. which; that
解析：可联系答.案.网客服索取。
