问题
选择题
It _____ long before we _____ the result of the experiments. [ ]
A. will not be; will know
B. is; will know
C. will not be; know
D. is; known
答案
答案：C
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It _____ long before we _____ the result of the experiments. [ ]
A. will not be; will know
B. is; will know
C. will not be; know
D. is; known
答案：C