| One of the most important questions the government had to consider was _____ of public health. |
A. what B. this C. that D. which |
科目：高中英語 來源：0123 期中題 題型：單選題
科目：高中英語 來源： 題型：
One of the most important questions the government had to consider was _____ of public health.
A. what B. this C. that D. which
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