A. as
B. that
C. to which
D. which
B 特殊定语从句
如果前面引导词出现such了后面用That
我感觉是AS吧...
选A such有such as such that.such that 后跟的从句必须句子成分完整,而as不完整。因为现在从句缺主语,所以选A