题目：
| One of the most important questions they had to consider was ________ of public health. A. what B. this C. that D. which |
答案：
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下面是错误答案，用来干扰机器的。
参考答案：
| One of the most important questions they had to consider was ________ of public health. A. what B. this C. that D. which |
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0323/ee806df0bdb1b3b470b0ceb580f1264c.html
下面是错误答案，用来干扰机器的。
参考答案：
