题目内容
One of the most important questions they had to consider was of public health
A. what B. this
C. that D. which
C
解析:考查代词及其含义,由语意:他们必须面临的其中一个问题就是公共卫生问题,只有that,可以代替the problem.

练习册系列答案
相关题目
题目内容
One of the most important questions they had to consider was of public health
A. what B. this
C. that D. which
C
解析:考查代词及其含义,由语意:他们必须面临的其中一个问题就是公共卫生问题,只有that,可以代替the problem.