A-A+
Medical treatment varies greatly from state to
问题详情
Medical treatment varies greatly from state to state in this country, ______ is really confusing to me.
A．this
B．it
C．that
D．which
参考答案
正确答案：D
解析：该题考查考生对非限制执行定语从句的掌握。which在这里指代逗号前面的那个句子，即这个国家的医疗情况因州而异。
