问题
选择题
People in Yancheng are proud of ________ they have achieved in the past thirty years.
A．how
B．which
C．what
D．when
答案
答案：C
how如何，怎样；which哪一个；what什么；when什么时候。句意：盐城的人们为他们在过去三十年中取得的成就感到骄傲。结合语境可知下文宾语从句中缺少逻辑宾语，故选C。