问题
选择题
With the fresh water ____ short, we human beings are facing the danger of dying from thirst at any time. [ ]
A. to run
B. to be run
C. running
D. run
答案
答案：C
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With the fresh water ____ short, we human beings are facing the danger of dying from thirst at any time. [ ]
A. to run
B. to be run
C. running
D. run
答案：C